Form 1 Mid Term 1 2022 Exams Questions and Answers

Form 1 Mid Term 1 2022 Exams Questions and Answers (13)

This category contains Form 1 Mid Term 1 2022 Exams Questions and Answers. These 2022 Form 1 Mid Term 1 exams are from national high schools like alliance high school, maranda high school, kabarak high school, mang'u high school, kenya high school. They can also be downloaded as pdf.

06
April

Questions 

  1. Define the term home science(2mks)
  2. State two ways in each case how home science benefits(6mks)
    1. Individual
    2. The family
    3. Nation
  3. List four income-generating activities a home science student can engage in (4mks)
  4. Identify and discuss five subjects that are related to home science (10mks)
  5. State two career opportunities that are related to home science(2mks)
  6. Name two glands found I the skin(2mks)
  7. State two ways to care for nails(2mks)

Marking Scheme

  1. Define the term home science(2mks)
    • Home science is applied and integrated science that deals with household management

  2. State two ways in each case how home science benefits(6mks)
    1. Individual
      • It helps an individual to improve his well being.
      • It lays a foundation for career development in arrears related to home science such as hotel management, catering, nutrition and dietetics.
      • It helps the individual to become a better household manager.
      • It helps one to maintain environmental hygiene.

    2. The family
      • Planning, preparing and serving nutritious meals to meet the needs of individual family members.
      • Practicing safety precautions at home in the event of an injury or an illness he/she can administer first Aid.
      • Choosing, making, and repairing family clothes and household articles.
      • Assisting the family in keeping the home clean.
      • Engaging in income-generating activities such as making and selling foodstuffs, soft furnishing and household articles.

    3. Nation
      • The individual acts as a role model in his or her own chosen career.
      • The individual renders services to the nation. this helps to raise the living standards of the people.
      • The community benefits if an individual with Home science knowledge and skills works within the community rendering services such as teaching, extension work or nursing.

  3. List four income-generating activities a home science student can engage in (4mks)
    • Making and repairing clothes for people at a fee.
    • Cooking and selling some food items.
    • Making soft furnishing items for sale.
    • Cleaning homes and offices and doing laundry work for people at a fee.
    • Coaching pupils
    • Coaching pupils and offering tutorial services at a fee.

  4. Identify and discuss five subjects that are related to home science (10mks)
    • Physics-use of heat during cookery.
    • Chemistry-stain removal during laundry.
    • Microbiology-preservation of food to prevent food poisoning.
    • Biology-understanding the human body and prevention of diseases.
    • Geography-housing the family, knowledge of climatic and soil conditions of a place.
    • Mathematics-measuring ingredients in cookery.
    • Economics and business studies- drawing a kitchen budget
    • Art and design-decorating a house.

  5. State two career opportunities that are related to home science(2mks)
    • Catering
    • Accommodation
    • Hotel management
    • Interior decoration
    • Hairdressing
    • Beauty related careers eg.manicure
    • Health care i.e. nursing.
    • Nutrition.

  6. Name two glands found I the skin(2mks)
    • Sweat glands
    • Sebaceous glands

  7. State two ways to care for nails(2mks)
    • Wash them in warm soapy water using a soft brush.
    • Rinse them thoroughly with warm water.
    • Wash the nails with a nailbrush to remove any dirt underneath. cut and file the fingernails to keep them short and well-shaped.
    • Avoid the habit of biting nails. This makes them rugged and ugly also unhealthy.
06
April

Questions

  1. Define the following terms:-
    1. Computer 2mks
    2. Data 2mks
    3. Processing 2mks
    4. Information 2mks
  2. State the different physical parts that make up a computer. (4mks)
  3. Draw and name the parts of a computer. (4mks)
  4. Classify computers (3mks)
  5. Why is the computer screen also called monitor? (2mks)
  6. State and explain 6 characteristics of computers (6mks)
  7. What is the function of the following;
    1. Keyboard
    2. Mouse
    3. Monitor

Marking Scheme

  1. Define the following terms:-
    1. Computer 2mks
      • A computer is an electronic device capable of receiving data (input) and performs a sequence of operations (processing) to produce output also known as information

    2. Data 2mks
      • Data refers to raw facts that are meaningless to the user and cannot be used to make decision.

    3. Processing 2mks
      • Refer to the way data is manipulated to turn into information. e.g. arithmetic,operations,addition,subtraction.

    4. Information 2mks
      • Refers to processed data that is meaningful to the user.

  2. State the different physical parts that make up a computer. (4mks)
    • System unit/central processing unit (CPU)
    • Monitor
    • Mouse
    • keyboard

  3. Draw and name the parts of a computer. (4mks)
  4. Classify computers (3mks)
    • Classified according to; functionality, physical size and purpose.

  5. Why is the computer screen also called monitor? (2mks)
    • It enables the user to monitor or see what is going on the computer system.

  6. State and explain 6 characteristics of computers (6mks)
    • Fast- in terms of speed.
    • Accurate- has high degree of accuracy, do not make errors.
    • Versatile-computers are flexible in the way they are used to carry out different types of activities.
    • Reliable-computers are more reliable because they do not get tired or bored in processing repetitive tasks.
    • Memory-computers have in-built memory used to store and retrieve large amount of data.
    • Diligent-a computer can perform repetitive or routine tasks without getting bored, tired or losing concentration.

  7. What is the function of the following;
    1. Keyboard
      • Enables the user to enter data and instructions in the computer by pressing keys.
    2. Mouse
      • Is a pointing device that enables the user to execute commands. Used to control an arrow displayed on the screen.
    3. Monitor
      • It is a television-like device used for displaying information from the system unit.
06
April

Questions

  1. Define the term business. (2mks)
  2. State four importance of business studies in society. (4mks)
  3. State the term given to each of the following statements. (4mks)
    1. Activities carries out with a view of making profit. ___________________
    2. Increasing the usefulness of a good or services. ___________________________
    3. Movements of goods from producer to consumers ________________________
    4. A person who use a good or services ___________________________
  4. State four types of business activities. (4mks)
  5. State whether each of the following factors fall under micro-environment or macro-environment. (4mks)
    Factors Micro/macro- environment
    Competitive environment  
    Legal-political environment  
    Business structure  
    Business culture  
  6. Differentiate between internal business environment from external business environment.
    1. Internal (2mks)
    2. External (2mks)
  7. State four characteristic of human wants. (4mks)
  8. State four characteristics of Goods. (4mks)

Marking Scheme

  1. Define the term business. (2mks)
    • Business refers to any activity carried out by an individual or by an organsation with an aim of making profit.

  2. State four importance of business studies in society. (4mks)
    • Equips members with knowledge and skills necessary to start business.
    • Helps individual to develop positive attitudes towards the environment.
    • Enable one to understand the role of government in business
    • Equip one with knowledge and skill required to evaluate business performance.

  3. State the term given to each of the following statements. (4mks)
    1. Activities carries out with a view of making profit.
      • Business
    2. Increasing the usefulness of a good or services.
      • Production
    3. Movements of goods from producer to consumers
      • Distribution
    4. A person who use a good or services
      • Consumer

  4. State four types of business activities. (4mks)
    • Extraction
    • Construction
    • Trade
    • Processing of row materials

  5. State whether each of the following factors fall under micro-environment or macro-environment.
    Factors Micro/macro- environment
    Competitive environment Macro
    Legal-political environment Macro
    Business structure Micro
    Business culture Micro
  6. Differentiate between internal business environment from external business environment.
    1. Internal (2mks)
      • These are factors that are within the business itself.

    2. External (2mks)
      • These are factors that affect the business from outside.

  7. State four characteristic of human wants. (4mks)
    • They are insatiable
    • Some are universal
    • They are competitive
    • They vary in intensity and urgency.

  8. State four characteristics of Goods. (4mks)
    • Are tangible
    • Can be stored
    • Can be standardized
    • Can change possesion.
06
April

Questions

  1.        
    1. Define the term agriculture correctly (1mk)
    2.        
      1. Give two practices that shows agriculture is a science subject. (2mks)
      2. Give two practices that shows agriculture is an art subject. (2mks)
  2. State five roles of agriculture in the Kenyan economy. (5mks)
  3. List the Five branches of agriculture. (5mks)
  4. Define the following terms as used in crop production. (2mks)
    1. pomology
    2. floriculture
  5. State two reasons why nomads move with their livestock from place to place. (2mks)
  6.        
    1. Give two effects of HIV/AIDS in Agriculture (2mks)
    2. Give four advantages of mixed farming (4mks)
  7.      
    1. State three aspects of rainfall important to a farmer (3mks)
    2. Mention two methods of farming (2mks)

Marking Scheme

  1.        
    1. Agriculture is the art and science of crop production and livestock rearing
    2.          
      1. Science activities
        crop pathology, entomology, agricultural engineering, soil science, genetics
      2. Art activities
        construction of farm structures, tilling of land, measuring distance, machine operation, harvesting crops, feeding and handling livestock, marketing of agricultural produce.
  2.             
    • food supply
    • source of employment
    • provision of foreign exchange
    • source of raw materials for industries
    • provision of market for industrial goods
    • source of money or capital
  3. Crop production, livestock production, soil science, agricultural economics, agricultural engineering
  4.    
    • pomology; growing of fruits
    • Floriculture; growing of flowers
  5.      
    • search for food
    • Search for water
  6.     
    1.            
      • shortage of labour
      •  increase cost of living of AIDS patients
      •  low living standards leading to despondency and hopelessness
      • government and NGO’S are using a lot of time and money in controlling the pandemic
    2.      
      • There is a mutual benefit between the plants and animals
      •  if one of the enterprise fails the farmer can try the other one
      •  High profit realized from the two enterprises
  7.    
    1. Rainfall reliability, rainfall distribution, rainfall intensity, amount of rainfall
    2.         
      • Mixed farming
      • Nomadic pastrolism
      • Shifting cultivation
      • Agroforestry
06
April

Questions

  1. State four reasons why CRE is taught in schools today? (4 marks)
  2. Give four literary forms used to write the bible (4marks)
  3. Highlight four reasons why the bible is referred to us the word of God. (4marks)
  4. Name the four national goals of education.(4 marks)
  5. Outline five versions of the bible used in Kenya today. (4 marks)
  6. Mention four Pentateuch books. (4 marks)
  7. List three Attributes of God from the creation accounts. (3 marks)
  8. Give 3 similarities in the 1st and 2nd accounts of creation(3mks)

Marking Scheme

  1. State four reasons why CRE is taught in schools today? (4 marks)
    • To get better understanding of god
    • To appreciate your own religion and thet of others
    • To help aquire principles of Christian way of living
    • To help us develop a sense of self worth and identify for ourselves and others
    • To promote international consciousness
    • To help us live new lives in Christ
    • To help form a bridge for further studies and career development.
    • To identify answers to some life’s questions.
    • To contribute to the achievement of the national goals of education.

  2. Give four literary forms used to write the bible (4marks)
    • Legislative texts (Leviticus)
    • Wise sayings(proverbs)
    • Prayers(Nehemiah)
    • Prophetic speeches (Jeremiah)
    • Love songs(songs of Solomon)
    • Philosophical essays(job)
    • Religious epics(exodus)
    • Epistles(Romans)
    • Gospel(Luke)

  3. Highlight four reasons why the bible is reffered to us the word of God. (4marks)
    • It was inspired by God
    • It contains the words of people such as prophets who were sent by god.
    • God himself took part in the writing.(the ten commandments)
    • Much of the new testament is concerned with the good news of jesus Christ.
    • It contains events of jesus Christ.
    • The authors were inspired by the holy spirit.

  4. Name the four national goals of education.(4 marks)
    • National unity
    • National development
    • Individual development and self fulfillment.
    • Social equality.
    • International consciousness.
    • Respect and development of cultural heritage.

  5. Outline five versions of the bible used in Kenya today. (4 marks)
    • Good news bible
    • Revised standard version
    • The African bible
    • Common bible
    • king James version.
    • Jerusalem bible
    • The living bible
    • The Gideon’s international version.

  6. Mention four Pentateuch books. (4 marks)
    • Genesis
    • Exodus
    • Leviticus
    • Numbers
    • Deutronomy

  7. List three Attributes of God from the creation accounts. (3 marks)
    • Self existent
    • Personal god
    • Sole creator
    • God of order
    • Good and perfect
    • Sole source of life
    • He is a moral god
    • He is a spirit
    • He is powerful
    • He is the provider and sustainer of the universe.
    • He is a worker.

  8. Give 3 similarities in the 1st and 2nd aacounts of creation(3mks)
    • Human beings share in the life of god in both creatins accounts
    • God is the sole creator in both creation accounts
    • In both accounts creation includes both the living and non-living objects.
    • Human beings are presented as special creatures in both creation accounts.
06
April

Questions

  1. Give the relationship between history and Government (1mk)
  2. Define the term pre-history (1mk)
  3. Identify two branches in the study of History and Government of Kenya (2mks)
  4. Identify one form of government (1mk)
  5. State function of each of the three arms of government (6mks)
  6. Give four characteristics of government (4mks)
  7. Give five unwritten sources of information on History and Government (5mks)
  8. Identify two types of oral traditions used to obtain information on history and government (2mks)
  9. Give one contribution of archeology to the study of history (1mk)
  10. Give three reasons of studying the government (3mk)
  11. Give one theory explaining the origin of man (1mk)
  12. Why was fire important to the early man? (1mk)
  13. Identify the name of tools made by Homo erectus (1mk)
  14. Give one spread of Homo Sapiens (1mk)

Marking Scheme

  1. Give the relationship between history and Government (1mk)
    • History is the study of the past human activities while Government is the study of how people are governed.

  2. Define the term pre-history (1mk)
    • It is the study of the past human activities before the invention of writing/ the study of unrecorded past humanactivities.

  3. Identify two branches in the study of History and Government of Kenya (2mks)
    • Social history
    • Political history
    • Economic history

  4. Identify one form of government (1mk)
    • Dictatorship
    • Democratic
    • Historic
    • Monarchy

  5. State function of each of the three arms of government (6mks)
    • Legislature – It makes laws
    • The executive – It implements laws
    • The judiciary – It interprets laws

  6. Give four characteristics of government (4mks)
    • It has rules
    • Sovereignty
    • Jurisdiction
    • Legitimacy
    • Law enforcement

  7. Give five unwritten sources of information on History and Government (5mks)
    • Oral traditions/oral source
    • Archaeology /palaentology
    • Genetics
    • Linguistiucs
    • Anthropology

  8. Identify two types of oral traditions used to obtain information on history and government (2mks)
    • Riddles
    • Myths
    • Songs
    • Poems
    • Tongue twister
    • Proverbs
    • Legends
    • Dances

  9. Give one contribution of archeology to the study of history (1mk)
    • It provides information on the origin of human/ cradles/ earliest human beings.
    • It provides information on peoples way of life
    • It helps people to locate historical sites
    • It provides information on the chronological order of historical events

  10. Give three reasons of studying the government (3mk)
    • To understand how different organs of government function
    • To understand how laws are made/ enforced
    • To have knowledge of the duties nights
    • To enable citizens know their nights
    • To be able to compare political systems of the world

  11. Give one theory explaining the origin of man (1mk)
    • The creation theory
    • The mythica/ traditional theory
    • The evolution theory

  12. Why was fire important to the early man? (1mk)
    • Fire provided warmth in the night and during cold spell
    • It was used for hunting
    • Fire was used as food presevative

  13. Identify the name of tools made by Homo erectus (1mk)
    • Acheulian

  14. Give one spread of Homo Sapiens (1mk)
    • The Rhodesian man
    • Neanderthal man
    • Cro-magnum man
06
April

Questions

  1. Define the term Geography. (2mks)
  2. Name two main branches of geography. (2mks)
  3. Explain the relationship between Geography and mathematics. (2mks)
  4. State any four importance of studying geography. (4mks)
  5. What is the solar system? (2mks)
  6. List two theories that explain the origin of the solar system. (2mks)
  7. State four proofs that indicate that the earth is spherical. (4mks)
  8. Identify the three forces that are responsible for the shape of the earth. (3mks)
  9. Differentiate between rotation and revolution of the earth. (2mks)
  10. When the time at Kabale (300E) is noon, what is the local time at Wajir (400E). (3mks)
  11. The diagram below shows the internal structures of the earth. Use it to answer the questions that follow.
    Geof1mt122q11
    1. Name the main layers M and N (2mks)
    2. Identify the discontinuities X and Y(2mks)

Marking Scheme

  1. Define the term Geography. (2mks)
    • It is the study of the earth as a home of man.
    • Study of interrelationship on natural and human phenomena on the earth’s surface.
  2. Name two main branches of geography. (2mks)
    • Physical geography
    • Human and economics geography

  3. Explain the relationship between Geography and mathematics. (2mks
    • mathematical techniques are used in drawing graphs and pie charts and mathematical formulae are used in geography to calculate distances, areas, population density, population densities, etc.

  4. State any four importance of studying geography. (4mks)
    • Geography is a career subject
    • It helps learners to develop the skills of observing, reading, analyzing and interpretation of maps, photographs, charts, diagrams and statistical data.
    • It enables the learner to understand and appreciate different environmental influences at work on different societies.
    • Geography encourages international awareness, interaction and co-operation.
    • In learning geography, one is able to acquire basic skills and knowledge which contribute to local, regional and national development.
    • Geography creates awareness in the people on the significance of management and conservation of the environment.
    • Through fieldwork, geography teaches one how to manage time.

  5. What is the solar system? (2mks)
    • It is a composition of the sun, planets and other heavenly bodies.

  6. List two theories that explain the origin of the solar system. (2mks)
    • Passing star theory
    • Nebula cloud theory

  7. State four proofs that indicate that the earth is spherical. (4mks)
    • Circumnavigation
    • The earth’s horizon is circular
    • During the eclipse of the moon, a spherical shadow of the earth is cast on the moon.
    • Photographs taken by satellites at great distance away from the earth shows that the earth is spherical.
    • When a ship is approaching a port, you first see the smoke then mast and finally the whole ship
    • Since all the other planets are spherical, the being a planet, is also concluded to be spherical.

  8.  Identify the three forces that are responsible for the shape of the earth. (3mks)
    • Force of gravity
    • Centripetal force
    • Centrifugal force

  9. Differentiate between rotation and revolution of the earth. (2mks)
    • Rotation of the earth is the movement of the earth on its own axis while revolution is the movement of the earth around the sun on its own orbit.

  10. When the time at Kabale (300E) is noon, what is the local time at Wajir (400E). (3mks)
    • Difference in degrees
      400-300=100
    • If 10→4min
      100→?
      10×4
      1
      =40mins
    • Wajir is to the East of Kabale, so it is ahead in time
      12.00+40
      =12.40 p.m

  11. The diagram below shows the internal structures of the earth. Use it to answer the questions that follow.
    1. Name the main layers M and N. (2mks)
      • M -inner core
      • N- upper mantle
    2.  Identify the discontinuities X and Y. (2mks)
      • X -mohovicic 
      • Y-gutenberg
06
April

Questions

  1.          
    1. Name one product of the light stage during photosynthesis(1mk)
    2. Name the process by which water molecules are split by light during photosynthesis (1mk)
  2. What name is given to the process whereby :
    1. Red blood cells wrinkle after losing their water to a hypertonic solution?(1mk)
    2. Plant cells become flaccid after losing their water to a hypertonic solution?(1mk)
  3. Four equal strips A,B,C and D were cut from a potato whose cells had a sugar concentration of 28.5%.The strips were placed in sugar solutions of different concentrations as follows:
    A:10% B 15% C 25% D 35%
    1. What changes would you expect in strips A and D?2mks
    2. Account for the change in strip D(3mks)
  4. The figure below shows a small piece of visking tubing which is filled with potassium permanganate solution. Its free ends were tied tightly to prevent leakage .It was then dipped in a beaker full of distilled water. The set up was left for 2 hours .Its was observed that the distilled water was coloured purple.
    Biof1mt122q4
    1. What physiological process was being investigated.(1mk)
    2. Account for the observation made in (a) above.(3mks)
  5.      
    1. State three factors that affect enzyme activities.(3mks)
    2. Name the structures on an enzyme where substrate molecules fix themselves during an enzyme reaction.(1mk)
    3. State what would happen to an enzyme molecule if the temperature is:-
      1. Raised above 40˚c(1mk)
      2. Lowered below 10˚c.(1mk)
  6. The diagram below represents a set up that was used to investigate a certain process in a plant.
    Biof1mt122q6
    1. State the aim of the experiment.(1mk)
    2. State a factor that would affect the process.(1mk)
  7. State the importance of nucleic acids to an organisms.(1mk)
  8. State the significance of the following to a leaf:-
    1. Thinness(1mk)
    2. Presence of air spaces(1mk)
    3. Stomata(1mk)
  9. What is the role of roof hairs in plants.(1mk)
  10. What is meant by the term organ systems in organisms?(1mk)
  11. State three factors that affect the rate of diffusion (3mks)
  12. What is compensation point.(1mk)
  13.        
    1. State two properties of monosaccharide .(2mks)
    2. What is the main function of monosaccharide in organisms?(1mk)
  14. State the formula for calculating magnification when using the following
    1. Hand lens/naked eyes (1mk)
    2. A light microscopic (1mk)
  15. Explain why a mule, a product of mating between a horse and a donkey is sterile .(1mk)
  16. State two factors considered while grouping the organisms in the same species. (2mks)
  17. Describe how you would carry out food tests to test the presence of starch and reducing sugars on a food sample.
    1. Test for starch.(3mks)
    2. Test for reducing sugar (4mks)
  18. Explain how surface area to volume ratio idea may be applied to explain rate of diffusion in organisms.(2mks)
  19. Which organelles in a cell perform the following functions
    1. Manufacture of ribosomes(1mk)
    2. Package cell secretions(1mk)
    3. Energy production(1mk)
    4. Synthesis of carbohydrates.(1mk)
  20. Name the taxonomic unit with:
    1. The greatest number of organism.(1mk)
    2. The least number of organisms(1mk)
  21.   
    1. Define the term cell(1mk)
    2. When onion epidermal cells were placed and focused along the diameter of the field of view ,10 cells were viewed and counted. Calculate the length of each epidermal cell in micrometers (1mm = 1000micrometers).Assume the diameter of field of view= 3mm(2mks)
  22. Name the kingdom in which the organisms named below belong.
    1. Bacteria(1mk)
    2. Paramecium(1mk)
    3. Yeast(1mk)
  23. State the deficiency disease caused by deficiency of the following vitamins
    1. Vitamins A(1mk)
    2. .Vitamin D (1mk)
    3. Vitamin B1 (1mk)
  24.     
    1. State and explain how the ileum is adapted to perform its function.(4mks)
    2. State two functions of the colon during digestion.(2mks)
  25.    
    1. Name two diseases that affect human teeth.(2mks)
    2.        
      1. Write the dental formula of an adult human.(1mk)
      2. Work out the total number of teeth from the formula above.(1mk)
  26. In an experiment to investigate a factor affecting photosynthesis, a leaf of a potted plant which had been kept in the dark overnight was covered with aluminium foil as shown in the diagrams below.
    The set up was kept in sunlight for three hours after which a food test was carried out on the leaf.
    1. Which factor was being investigated in the experiment?(1mk)
    2. Which food test was carried out?(1mk)
    3.        
      1. State the results of the food test.(2mks)
      2. Account for the results in (c) (i) above.2mks
    4. Why was is necessary to keep the plant in darkness before the experiment? 1mk
  27.        
    1. Distinguish between the term s homodont and heterodont (2mks)
    2. Name the gap between incisors and premolars in some herbivores and state its function.(2mks)
  28. State and explain how palisade cells are adapted to perform their function.(3mks)
  29.      
    1. Define the term active transport .(2mks)
    2. State four factors that affect active transpiration.(4mks)
  30. State the function of the following parts of a light microscope.
    1. Coarse adjustment knob.(1mk)
    2. Diaphragm(1mk)
    3. Condenser(1mk)
  31. Name the first four taxa in taxonomy starting from the highest level

Marking Scheme

  1.          
    1. Hydrogen atoms/ions/oxygen/hydroxide/ions/energy;(1mk)
    2. Photolysis(1mk)
  2.      
    1. Crenation(1mk)
    2. Plasmolysis(1mk)
  3.       
    1. A – strip becomes longer and stiff (OWTTE)
      D- strips becomes shorter and flexible. (1mk)
    2. Solution D is hypertonic to the cell; causing the cells to lose their water to the sugar solution by osmosis; making the cells to become flaccid(3mks)
  4.             
    1. Diffusion(1mk)
    2. Potassium permanganate ions /particles are at a higher concentration in the visking tubing ; hence they diffuse through the semi permeable visking tubing ; to distilled water making the water to turn purple.3mks)
  5.            
    1.      
      • High /low temperature;
      • pH
      • Chemical inhibitors
      • substrate concentration
      • enzyme concentration (any 3=3mks)
    2. Active sites;(1mk)
    3.          
      1. it would be denatured (1mk)
      2. it would be in activated(1mk)
  6.              
    1. To show that oxygen is produced during photosynthesis /to investigate the effect of light on photosynthesis /to investigate the gas produced during photosynthesis(1mk)
    2. Concentartion of carbon(iv) oxide /temperature /light intensity(1mk)

  7. they carry(genetic) information on growth and development of an organism(1mk)
  8.      
    1. to allow quick /faster penetration of light(1mk)
    2. To store gases /to allow gaseous exchange(1mk)
    3.        
      • for gaseous exchange(1mk)
  9. to absorb water and mineral salts(1mk)
  10. a group of organs working together for a particular function(1mk)
  11.                 
    • difference in concentration of particles between two regions,Acc.Conc gradient /diffusion gradient
    • temperature
    • Pressure - agitation /shaking
    • size of the particles.(3mks)
    • thickness of membrane
  12. the time when the rate of photosynthesis and respiration balance /when rate of consumption of carbon(iv) oxide and its production balance.(1mk)
  13.            
    1.                
      • Are soluble in water;
      • they form sweet solutions
      • can crystallize (any 2 2mks
    2. are a source of energy (1mk)
  14.         
    1. Magnification =length of drawing 1mk
      length of actual object
      acc.width for length
    2. Magnification = eye piece lens magnification x objective lens magnification (1mk)
  15. they do not belong to the same species;
  16. sharing of many features;
    -ability to freely interbreed and produce fertile offspring;
  17.          
    1. Starch – add about 2cm3of iodine solution to the test substance ;a blue – black colour ; confirm starch present.(3mks)
    2. Reducing sugar = add about 2cm3 of Benedicts solution to the test substances ;heat to boil; colour changes from due – green- yellow –orange ; confirming presence of reducing sugar;(4mks)
  18. The greater the surface area to volume ratio; the faster the rate of diffusion(2mks)
  19.                
    1. Nucleolus(1mk)
    2. Golgi bodies(1mk)
    3. mitochondria
    4. smooth endoplasmic reticulum
  20.        
    1. Kingdom(1mk)
    2. Species(1mk)
  21.      
    1. It is the basic unit of life in an organism; (1mk)
    2. 3mm = 3000 micrometers
      = 3000 = 300 micrometers 2mks
      10
  22.          
    1. Monera(1mk)
    2. protoctista/protista(1mk)
    3. Fungi(1mk)
  23.                      
    1. Night blindness (1mk)
    2. Rickets ;(1mk)
    3. Beriberi(1mk
  24.        
    1.      
      • it is long to increase the surface area of absorption of food.
      • it is richly supplied with blood to transport digested food.
      • it is coiled to reduce the speed of flow of food and allow it to be fully digested /to occupy a smaller space/give more time for absorption
      • has villi to increase surface area of absorption of food.
      • it has a thin epithelium to allow faster diffusion of food molecule 1x4=4mks
    2.        
      • absorption of water and mineral salts
      • synthesis of vitamin K(2mks)
  25.                   
    1.         
      • Dental carriers
      • periodontal disease/gingivitis
      • pyorrhea (2mks)
    2.     
      1. I 2     C 1      Pm 2      M 3 (1mk)
          2         1            2          3

      2. 2+1+2+3=8x2=16
        2+1+2+3 = 8x2= 16
        32
  26.                
    1. Necessity of light in photosynthesis(1mk)
    2. Test for starch /starch test/starch/starch.(1mk)
    3.              
      1. the covered part of the leaf remains brown/yellow /retains the colour of iodine(1mk)
        and the uncovered part turns to blue black.(1mk)
      2. Starch was formed in the uncovered part (due to exposure to light)1mk
        but no starch was formed in the covered part /due to lack of light(1mk)
      3. To destarch the leaf /prevent it from making starch /ensure o starch is in the leaf(1mk)
  27.                            
    1. Homodant teeth –are of the same shape and size;heterodont teeth are of different shapes and sizse(2mks)
    2. Diastema(1mk)
      • helps in turning of food /helps to manipulate the food.
      • Helps to temporary store food(1mk)
  28.                      
    • are closely arranged to increase the surface area for photosynthesis.
    • chloroplasts are located on the upper part of the cells facing light
    • they have thin walls for faster penetration of light (3mks)
  29.                    
    1. Movement of particles /ions /molecules from a region of low concentration that of high concentration; and uses energy; acc movement against a conc gradient.
    2.            
      • presence of oxygen
      • presence of glucose
      • presence of enzyme
      • presence of inhibitors
      • temperature
  30.                                
    1. Raises /lower the body tube(1mk)
    2. regulates the amount of light passing through the condenser(1mk)
    3.  concentrates light towards the specimen(1mk)
  31.              
    • Kingdom
    • Division
    • Class
    • Order(4mks)
      NB: Stop marking when the order is wrong.
06
April

Questions

  1. Define physics? (1mks)
  2. Describe three branches of physics. (6mks)
  3. Describe any three relationship between physics and other subjects. (6mks)
  4. List five laboratory rules. (5mks)
  5. Define length and state its SI units. (2mks)
  6. State 2 factors that determine the choice of instrument to measure length. (2mks)
  7.          
    1. What is the SI unit for area. (1mk)
    2. Express the following into M2 (4mks)
      1. 9000cm2
      2. 0.05cm2
  8. The water level in a burette is 30cm3, 55 drops of water fall from the burette and average volume of one drop is 0.12cm3. What is the final water level in the burette. (3mks)
  9.          
    1. Define mass and give its SI units. (2mks)
    2. Covert the following into kilograms (1mk)
      1. 2 tonne
      2. 400 grams
      3. 600mg (millgram)
  10. The mass of 20cm3 of wood was found to be 0.4kg. Calculate the density of wood
    1. In kg/m3 (2mks)
    2. In g/cm3 (2mks)
  11. How has physics helped in advancement in medicine. (4mks)
  12. State four apparatus used in physics laboratory. (4mks)
  13. Express each of the following volumes in M3
    1. 27cm3 (2mks)
    2. 11000mm3 (2mks)
  14. Define volume and its SI units. (2mks)
  15. Define density and state the SI unit (2mks)

Marking Scheme

  1. Define physics? (1mks)
    • It is the study of matter and relation to energy

  2. Describe three branches of physics. (6mks)
    • Mechanics
    • Electricity of magnesium
    • Thermo dynamics
    • Geothermal optics
    • Waves

  3. Describe any three relationship between physics and other subjects. (6mks)
    • Physics and region
    • Physics and history
    • Physics and geography
    • Physics and home science
    • Physics biology
    • Physics chemistry
    • Physics and technology

  4. List five laboratory rules. (5mks)
    • Tuck in shirts and blouses- gas tap should be closed
    • Wear closed shoes- Wash hands after experiment
    • Follow instructions and fully
    • Windows and doors should be open when working in the laboratory
    • No eating in the lab

  5. Define length and state its SI units. (2mks)
    • Length is a measure of distance between two points. SI unit is metre (M)

  6. State 2 factors that determine the choice of instrument to measure length. (2mks)
    • Level of accuracy desired.
    • Size of the object to be measured.
  7.      
    1. What is the SI unit for area. (1mk)
      • M2
    2. Express the following into M2 (4mks)
      1. 9000cm2
        • 1m2=10000cm2
            ?      9000cm2
          =0.9m2

      2. 0.05cm2
        • 10000 – 1m2 
          0.05cm2
          0.05/10000 = 0.000005

  8. The water level in a burette is 30cm3, 55 drops of water fall from the burette and average volume of one drop is 0.12cm3. What is the final water level in the burette. (3mks)
    • Volume of all drops – 355 x 0.12 =6.6cm
      30 x 6.6cm3 36.6cm3
  9.               
    1. Define mass and give its SI units. (2mks)
      • Mass is quantity of matter in an object. Its SI unit is kilogram.

    2. Covert the following into kilograms (1mk)
      1. 2 tonne
        • I tone – 1000kg
          2 tonne – 200kg

      2. 400 grams
        • 1000g – 1kg
          400gram ? 400/1000 0.4kg

      3. 600mg (millgram)
        • 600/1000= 0.0006kg

  10. The mass of 20cm3 of wood was found to be 0.4kg. Calculate the density of wood
    1. In kg/m3 (2mks)
      • Density = mass/volume=0.4/0.00002=2000kg/m3

    2. In g/cm3 (2mks)
      • 0.4 x 1000=40g/20cm3=2g/cm3

  11. How has physics helped in advancement in medicine. (4mks)
    • Gamma rays used to destroy body cells
    • Microscopes observes disease causing organisms
    • Stethoscope checks heatbeats
    • Lenses used to correct eye defects
    • X rays used for producing
    • Brain scanner check damage in brain
    • Hearing aids used by people with ear problems

  12. State four apparatus used in physics laboratory. (4mks)
    • Ammeter
    • Voltmeter
    • Thermometer
    • Beam balance
    • Metre rule
    • Wires
    • Lenses
    • Mirrors
    • Diodes
    • Resistors
    • Bulbs
    • magnets

  13. Express each of the following volumes in M3
    1. 27cm3 (2mks)
      • Im3= 1000000cm3
        ?        27cm3
        0.000027m3

      • 11000mm3 (2mks)
        1m3  =1000mm3
           ?       11000mm3
        11cm3
        1m3=1000000xm3
            ?=11000cm
        =11000 = 0.011m3

  14. Define volume and its SI units (2mks)
    • It is the amount of space occupied by matter. SI units metre3

  15. Define density and state the SI unit.
    • Density is mass per unit volume of in object. Its SI unit is kilogram per cubic metre. (kgm-3or kg/m3)
06
April

Questions

  1. Define the following terms:
    1. Chemistry (2mks)
    2. Matter (1mk)
    3. Drug abuse (1mk)
  2. Name four career opportunities open to a chemist. (4mks)
  3. Name three frequently abused drugs. (3mks)
  4. Explain why most laboratory apparatus are made of glass. (2mks)
  5. Name three apparatus used for measuring volumes. (3mks)
  6. Name the function of the following apparatus. (2mks)
    1. Conical flask
    2. Boiling tube
  7. Draw a well labeled diagram of a Bunsen burner. (4mks)
  8. Give four differences between a luminous and non-luminous flame. (4mks)
    Luminous flame Non-luminous flame
       
       
       
       
       
       
  9. Name two safety rules in the laboratory. (2mks)
  10. Define:
    1. Sublimation (1mk)
    2. Chromatography (1mk)

Marking Scheme

  1. Define the following terms:
    1. Chemistry (2mks)
      • Chemistry is the study of the structure properties and composition of mater and the changes that matter undergoes.

    2. Matter (1mk)
      • Is anything that has mass and occupies space.

    3. Drug abuse (1mk)
      • Is the use of a drug for a purpose other than that for which it is meant.

  2. Name four career opportunities open to a chemist. (4mks)
    • Manufacture of drugs to fight diseases.
    • Food production to fight hunger
    • Manufacture of cheaper alternative fabrics such as nylon, polyester and tetron.
    • Manufacture of detergent
    • Manufacture of plastics for roofing, packing and domestic use.
    • Production of fuels for transport and domestic use.

  3. Name three frequently abused drugs. (3mks)
    • Tobacco
    • Alcohol
    • Bhang
    • Miraa (khat)

  4. Explain why most laboratory apparatus are made of glass. (2mks)
    • They do not react with most of the reagents
    • They allow one to see through while observing the reactions taking place or to determine the level of the liquids.

  5. Name three apparatus used for measuring volumes. (3mks)
    • Beaker
    • Conical flask
    • Measuring cylinder
  6. Name the function of the following apparatus. (2mks)
    1. Conical flask
      • Used for general laboratory experiments and for measuring approximate volumes of liquids.

    2. Boiling tube
      • Used when heating substances

  7. Draw a well labeled diagram of a Bunsen burner. (4mks)
    Chemf1mt122qa7
  8. Give four differences between a luminous and non-luminous flame. (4mks)
    Luminous flame Non-luminous flame
    Has four zones Has three zones
    The flame is not noisy The flame is noisy
    The flame is yellow The flame is blue
    The flame is large and waxy The flame is small and straight
    The flame has four zones The flame has three zone
    The flame produce soot The flame does not produce soot
  9. Name two safety rules in the laboratory. (2mks)
    • Never taste or eat anything in the laboratory to avoid poisoning.
    • Label all the chemicals you are using to avoid confusion.

  10. Define:
    1. Sublimation (1mk)
      • The process where a substance changes from solid to vapour directly or vapour to solid without forming.
    2. Chromatography (1mk)
      • This is the process/method which is used to separate the components of a mixture/ coloured components.