Questions
- Define physics? (1mks)
- Describe three branches of physics. (6mks)
- Describe any three relationship between physics and other subjects. (6mks)
- List five laboratory rules. (5mks)
- Define length and state its SI units. (2mks)
- State 2 factors that determine the choice of instrument to measure length. (2mks)
-
- What is the SI unit for area. (1mk)
- Express the following into M2 (4mks)
- 9000cm2
- 0.05cm2
- 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)
-
- Define mass and give its SI units. (2mks)
- Covert the following into kilograms (1mk)
- 2 tonne
- 400 grams
- 600mg (millgram)
- The mass of 20cm3 of wood was found to be 0.4kg. Calculate the density of wood
- In kg/m3 (2mks)
- In g/cm3 (2mks)
- How has physics helped in advancement in medicine. (4mks)
- State four apparatus used in physics laboratory. (4mks)
- Express each of the following volumes in M3
- 27cm3 (2mks)
- 11000mm3 (2mks)
- Define volume and its SI units. (2mks)
- Define density and state the SI unit (2mks)
Marking Scheme
- Define physics? (1mks)
- It is the study of matter and relation to energy
- It is the study of matter and relation to energy
- Describe three branches of physics. (6mks)
- Mechanics
- Electricity of magnesium
- Thermo dynamics
- Geothermal optics
- Waves
- 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
- 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
- Define length and state its SI units. (2mks)
- Length is a measure of distance between two points. SI unit is metre (M)
- Length is a measure of distance between two points. SI unit is metre (M)
- State 2 factors that determine the choice of instrument to measure length. (2mks)
- Level of accuracy desired.
- Size of the object to be measured.
-
- What is the SI unit for area. (1mk)
- M2
- Express the following into M2 (4mks)
- 9000cm2
- 1m2=10000cm2
? 9000cm2
=0.9m2
- 1m2=10000cm2
- 0.05cm2
- 10000 – 1m2
0.05cm2
0.05/10000 = 0.000005
- 10000 – 1m2
- 9000cm2
- What is the SI unit for area. (1mk)
- 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
- Volume of all drops – 355 x 0.12 =6.6cm
-
- Define mass and give its SI units. (2mks)
- Mass is quantity of matter in an object. Its SI unit is kilogram.
- Mass is quantity of matter in an object. Its SI unit is kilogram.
- Covert the following into kilograms (1mk)
- 2 tonne
- I tone – 1000kg
2 tonne – 200kg
- I tone – 1000kg
- 400 grams
- 1000g – 1kg
400gram ? 400/1000 0.4kg
- 1000g – 1kg
- 600mg (millgram)
- 600/1000= 0.0006kg
- 600/1000= 0.0006kg
- 2 tonne
- Define mass and give its SI units. (2mks)
- The mass of 20cm3 of wood was found to be 0.4kg. Calculate the density of wood
- In kg/m3 (2mks)
- Density = mass/volume=0.4/0.00002=2000kg/m3
- Density = mass/volume=0.4/0.00002=2000kg/m3
- In g/cm3 (2mks)
- 0.4 x 1000=40g/20cm3=2g/cm3
- 0.4 x 1000=40g/20cm3=2g/cm3
- In kg/m3 (2mks)
- 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
- State four apparatus used in physics laboratory. (4mks)
- Ammeter
- Voltmeter
- Thermometer
- Beam balance
- Metre rule
- Wires
- Lenses
- Mirrors
- Diodes
- Resistors
- Bulbs
- magnets
- Express each of the following volumes in M3
- 27cm3 (2mks)
- Im3= 1000000cm3
? 27cm3
0.000027m3 - 11000mm3 (2mks)
1m3 =1000mm3
? 11000mm3
11cm3
1m3=1000000xm3
?=11000cm
=11000 = 0.011m3
- Im3= 1000000cm3
- 27cm3 (2mks)
- Define volume and its SI units (2mks)
- It is the amount of space occupied by matter. SI units metre3
- It is the amount of space occupied by matter. SI units metre3
- 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)
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