Topic : Energy
Marks: 30
Q1. Fill in the blanks(5)
1. The energy possess by a body on account of it position is known as ...............
2. When the ball rolls down ............. Energy is converted to ......... Energy.
3. Coal possess .......... Energy.
4. Electrical energy is converted to light energy in ....…........
Q2. Answer the following (10)
1. Define Heat energy
2. What is the unit of energy?
3. What is energy?
4. State the conversion of energy in photosynthesis.
5. Write the law of conservation of energy.
6. Name the energy created by vibration of particles.
7. One example where magnetic energy is used in our day today life.
8. Sam was rubbing comb on his head, and then bought pieces of paper near it.
a. what was his observation? Why?
9. How is nuclear energy produced?
Q3. Answer in brief
1. Write about conversion of energy(4)
a. Television
b. Solar cell
c. Geyser
d. Windmill
2. In Roller coaster,
A. which energy is acquired at the top of the roller coaster
B. At the bottom of roller coaster.(2)
3. In dam how does the conversion of energy takes place.(2)
4. Why do you think energy is important? (2)
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