Science Questions and Answers - Standard 7 Term 2 Opener 2022 Set 2

QUESTIONS

1. The undigested food material is temporarily stored in the 
   1. anus
   2. rectum 
   3. colon
   4. small intestine
2. Which one of the following pairs shows living components of an environment? 
   1. Plants and animals
   2. Animals and soil 
   3. Air and water
   4. Plants and water
3. When setting and carrying out an investigation on soil drainage. What should not be the same? 
   1. Amount of soil 
   2. Size of funnels 
   3. Size of collecting jars
   4. Amount of cotton wool used 
4. Cross pollination is the transfer of pollen grain from the
   1. anthers to stigma of any flower. 
   2. anthers of one flower to the stigma of another flower 
   3. anther of one flower to the stigma of another flower on a different king of a plant 
   4. anthers of one flower to the stigma of another flower on a different plant of the same kind 
5. The diagram below shows female reproductive system.
   
   Which letter above shows where fusion of sex cells take place? 
   1. W
   2. X 
   3. Y
   4. Z
6. Which one of the following diseases cannot be prevented by maintaining proper hygiene? 
   1. Bilharzia
   2. Cholera
   3. Anaemia
   4. Typhoid
7. Which one of the following leads to water pollution? 
   1. Burying banana peels in soil. 
   2. Washing clothes and vehicle in river 
   3. Releasing treated sewage into rivers
   4. Using farm chemical sparingly 
8. Which of the following does not take place during inhalation? 
   1. Diaphragm flattens 
   2. ribs move outwards 
   3. pressure in lungs decreases
   4. volume of the chest cavity decreases 
9. Std 6 pupils prepared the set up below.
   
   The aspect of light investigated was 
   1. making of a rainbow 
   2. reflection of light by a mirror 
   3. refraction of light in water
   4. transfer of heat from sun by radiation
10. Which material below is not required when making liquid thermometer? 
    1. water
    2. ink 
    3. manila paper. 
    4. funnel
11. Which one of the following is untrue about duck billed platypus and ostrich? Both 
    1. lay fertilized eggs 
    2. are warm blooded 
    3. suckle their young ones 
    4. breath through lungs
12. Which stage of HIV/AIDS infection can the victim test positive without signs of the diseases?
    1. Full blown AIDS 
    2. Asymptomatic stage 
    3. Symptomatic stage
    4. Window stage
13. Sheet erosion is also called
    1. landslide 
    2. splash 
    3. rill
    4. spatter
14. The following are characteristics of a certain soil.
    • Least air spaces
    • Crack when dry
    • Smooth texture
    • Make the longest ribbons
      The soil above is likely to be 
      1. loam 
      2. clay 
      3. sand
      4. silt
15. The charts below shows method of food preservation?
    
    Which one of the following represents M, N and P respectively?
    

    M	N	P
    A.Canning	Drying	Salting
    B.Salting	Use low temperature	Drying
    C.Canning	Smoking	Drying
    D.Drying	Use of  honey	Low temperature

16. Which one of the following is not an importance of water in the diet? 
    1. Blood formation 
    2. Helps in food digestion 
    3. Helps in removal of faeces 
    4. Prevent dehydration
17. Std 7 pupils did the experiment below by dropping paper on burning fire as shown below.
     
    What were the pupils investigating? 
    1. Radiation
    2. Convection 
    3. Conduction 
    4. Air movement
18. Which blood component fight germs in the body? 
    1. White blood cells 
    2. Red blood cells 
    3. Platelets
    4. Plasma
19. Which type of teeth helps in cutting food?
    1. Canine
    2. Incisors
    3. Molars
    4. Premolars
20. The following are characteristics of a cloud.
    • Flats at the bottom
    • Look like cotton balls
    • Found high in the sky
      The clouds above are likely to be 
      1. cumulus
      2. nimbus 
      3. cirrus
      4. stratus
21. What is the main purpose of mulching?
    1. Remove weeds 
    2. Control soil erosion 
    3. Conserve water
    4. Remove excess water from soil
22. The following are effects of livestock diseases. Which one is not?
    1. Death of animals 
    2. Increased appetite 
    3. Low yields
    4. Transmission of diseases to people
23. In a farm water is used for
    1. boat racing 
    2. washing coffee berries 
    3. sport fishing 
    4. irrigating crops
24. The experiment below was done by Std 5 pupils while investigating transfer of heat.
    
    After sometime the pins dropped starting with W to the last pin Z. This was due to transfer of heat through a process called 
    1. radiation 
    2. convection 
    3. conduction
    4. expansion
25. The following are signs of a certain disease 
    • Pain in the chest 
    • Loss of weight
    • Sweating at night 
    • Blood in sputum and saliva
      The disease is likely to be 
      1. bilharzia
      2. tuberculosis
      3. malaria
      4. cholera
26. Which statement is true about liquids?
    1. Has definite mass and shape 
    2. Has definite size and shape 
    3. Has indefinite shape and size
    4. Has definite volume and mass
27. The force that resist motion is called 
    1. pressure
    2. weight 
    3. inertia
    4. friction
28. Which one of the components of the environment is abundant on the earth surface?
    1. Water 
    2. Air 
    3. Soil
    4. Animals and plants
29. Which crop below is not a tuber? 
    1. Carrot
    2. Arrowroot 
    3. Onion
    4. Beetroot
30. The component of air that is used in photosynthesis is also used for 
    1. plant germination 
    2. putting out fire 
    3. metal rusting 
    4. light bulbs
31. Which of the following crops pest is correctly matched with the damage they cause on crops? 
    1. Cutworms - Eat grains in the field 
    2. Aphids - suck sap on leaves 
    3. Weevils - cut stems of young plant
    4. Weaver birds - bore holes in stems
32. The set up below was used by pupils to investigate a certain component of soil.
    
    The soil component investigated is 
    1. inorganic matter
    2. organic matter 
    3. air
    4. water
33. Which one of the following is not a social effect of drug abuse?
    1. Truancy 
    2. Poor judgement 
    3. Accidents
    4. Rape
34. Which one of the following is true about both miraa and alcohol? They 
    1. cause liver cirrhosis 
    2. are depressants 
    3. are legal drugs
    4. are prohibited in Kenya 
35. The diagram below shows interdependence between plants.
    
    This shows plants interdependence on 
    1. habitat
    2. shade
    3. support
    4. nutrients
36. Which experiment below can be used to demonstrate what happens to the passengers when the car brakes abruptly?
    
37. Which vaccine is given to an infant at the age of 9 months 
    1. Tuberculosis 
    2. Polio 
    3. Cholera
    4. Measles
38. Which animal below has scales on its body?
    1. Frog
    2. Ostrich 
    3. Whale
    4. Salamandar
39. The chart below shows classification of crops.
    
    Which crops can correctly replace letters M, R and X respectively?
    

    M	R	X
    A.Tea	Flax	Sisal
    B.Sunflower	Sisal	Beans
    C.Coffee	Simsim	Sunflower
    D.Cocoa	Cotton	Maize

40. The tips of the thread-like structures found in the maize cob are 
    1. styles
    2. stigmas 
    3. anthers
    4. filaments
41. A metallic bowl floats on water due to its
    1. weight
    2. material 
    3. shape
    4. size
42. Insectivorous plants grow in soil that lacks
    1. oxygen
    2. water 
    3. nitrogen
    4. living organisms
43. Draining stagnant water can help in controlling diseases called 
    1. Cholera and Typhoid 
    2. Malaria and Typhoid 
    3. Bilharzia and Malaria
    4. Cholera and Malaria
44. Which group of foods below shows a balanced diet?
    1. Kales, oranges, meat 
    2. Cassava, onion, milk 
    3. Chapati, milk, meat
    4. Chips, chickens, soda
45. Std 4 pupils carried out the experiment shown below.
    
    In order for the water to flow out smoothly from the tin, you should 
    1. raise the tin 
    2. reduce water
    3. make another hole on the lid
    4. make another hole next to the small hole
46. Which deficiency disease below is caused by lack of vitamins and minerals? 
    1. Rickets
    2. Anaemia 
    3. Kwashiorkor 
    4. Marasmus
47. Which weed has black seeds with hooks? 
    1. Oxalis
    2. Thorn apple 
    3. Black jack
    4. Mexican marigold
48. The best method to control the spread of HIV/AIDS among the youths is 
    1. use condoms 
    2. being faithful to the partner 
    3. by use of medicines
    4. abstinence
49. Which one of the following component of air keeps varying from time to time 
    1. water vapour 
    2. oxygen
    3. carbon dioxide 
    4. nitrogen
50. Which blood vessel carries deoxygenated blood to the heart?
    1. Aorta
    2. Vena cava
    3. Pulmonary vein
    4. Pulmonary artery

MARKING SCHEME