MATUNDA SECONDARY SCHOOL
P.O. BOX 90 - 01015
ITHANGA- CELL 0708688090
FORM 1 END OF TERM 3 PHYSICS EXAMINATION
1. If the gravitational field strength on the moon is 1/6 that of the Earth, calculate the weight of a person
whose mass is 45 kg when he is on the moon.
(Take gravitational field strength on earth as 10N and per Kg)
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2. A thread is carefully placed in a soap film which has been formed on a wire ring as shown in the
figure below.
a. Clearly show using a diagram what happens if the soap film Inside the thread is pierced by a needle.
(2 Marks)
b. What is the name of the force acting on the thread?
(1 Mark)
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3. A drop of water and a drop of Mercury were placed on a glass surface. The result was shown below.
Glass Surface
A
a. Identify the drops
A – …………………………………
b. Explain the difference in shape between A and B above
B
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B – ……………………………………
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4. Bright specks are normally observed moving in the smoke cell experiment. What are these specks?
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5. An athlete added 20 g of glucose to 40 cm3 of milk and stirred the mixture. No noticeable change in
the volume of milk was observed. Why is this so?
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6. Distinguish between temperature and heat
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7. How is heat loss through radiation minimized in a vacuum flask?
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8. The following experiment was conducted in a laboratory
The flame was passed over the paper wrap several times
a. What was observed at the end of the experiment?
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b. What does the experiment show about the conductivity of wood and that of iron?
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9. The figure below shows an electric heater placed Midway between two flask A&B. Flask A is shiny
on the outside and flask B is blackened on the outside.
a. Name the process through which heat travels from the heater to the flask.
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b. State the observation that will be made
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c. Give a reason for your observation above
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10. State two factors that affect heat transfer in solids
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11. Explain why at night the metal frames and supporting the glass in a window feel colder compared to
the glass.
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12. The figure below shows water being heated in a laboratory.
On the diagram show the path that the water will take as it heats up.
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13. Convert the following temperatures into Kelvin Scale
(4 Marks)
a. 130 degrees Celsius
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b. -163 degrees Celsius
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14. Convert the following temperatures into Celsius scale
(4 Marks)
a. 373 K
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b. 250 K
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15. Name two types of thermometers.
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16. Explain why burst water pipes are common during winter especially in countries near the poles
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17. Bimetallic strip is made from Aluminum and Copper. When heated, it bends in the direction shown
below.
a. Which metal expands more for the same temperature rise?
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b. Draw a diagram to show how the bimetallic would appear if cooled below room temperature.
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18. The figure below shows a liquid glass thermometer
a. Why is the thermometer only calibrated from 35 degrees Celsius to 43 degrees Celsius?
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b. What advantage does the thermometer have in terms of the temperature range over another liquid-inglass thermometer calibrated from 0 degrees Celsius to 100 degrees Celsius?
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c. Name the section labelled X
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d. What is the function of the part marked W?
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e. Explain how the part labelled X makes the thermometer appropriate for its function
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f. How would you sterilize the thermometer?
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19. The illustration below shows the layers of water in a sea in a cold region.
a. Explain how the fish survive under the water yet the top is frozen
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20. The diagram illustrates two types of reflection
A
a. Name the types of reflection
A…………………………….………
B
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B…………………………………
b. What kind of surface form the reflection demonstrated by B?
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21. Name the beams of light shown below
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22. A building 4 meters high is located 10 meters from the opening of a pinhole camera. If the screen of
a camera is 10 cm from the pinhole, calculate the height of the image formed.
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