Directions: Choose the letter of the BEST answer.

1. What is the heart of any power plant that converts mechanical energy into electrical

energy?

a. electricity

b. power

c. turbines

d. appliances

2. Which of these is NOT a precautionary measures in using electricity?

a. Avoid octopus connections.

b. Check all the wirings of your appliances.

c. Do not place appliances close to water sources.

d. Leave all appliances on when having a vacation for a long time.

3. What happens when heat is absorbed by an object?

a. It turns into sound energy. c. It turns into thermal energy.

b. It turns into kinetic energy. d. It turns into mechanical energy.
4. What happens when a spoon absorbs heat?

a. Its molecules vibrate faster.

b. Its molecules vibrate gently.

c. Its molecules stop vibrating.

d. Its molecules vibrate slower.

5. Light energy cannot move objects on its own. It is transformed to what form of energy

in order to make things move?

a. kinetic energy c. mechanical energy

b. potential energy d. electrical energy

6. Which of the following shows an example of elastic energy?

a. a rolling wheel c. pounding mortar and pestle

b. a pressed spring d. a falling debris

7. If an object is getting colder, what happens to its thermal energy?

a. decreases c. rapidly increasing

b. increases d. remains the same

8. Which of the following objects has the greatest amount of gravitational potential energy?

a. ball tossed horizontally

b. a ball rolling on the ground

c. ball at the 5th floor of a building

d. a ball on the 10th floor of a building

9. How does heat flow from one object to another?

a. heat flows from an object of higher temperature to lower temperature

b. heat flows from an object of lower temperature to high temperature

c. heat flows stops when one object has higher temperature than the other

d. none of the above

10. Why is it that you are advised not to have octopus connections at home?

a. it overloads the whole circuit

b. it is hard to untangle the wires

c. it is fine to have octopus connections

d. it divides the energy among the appliances
11. What does EM in EM waves stand for?

a. electromagnet c. electrical

b. electromagnets d. electromagnetic

12. Which does NOT contain a turbine inside to create electricity?

a. geothermal power plant c. solar power plant

b. hydroelectric power plant d. windmill power plant

13. Which of the following objects rely on gravitational potential energy?

a. bow

b. mortar and pestle

c. rubber band

d. strings

14 How does a solar vane function?

a. it harnesses the energy from the sun

b. it absorbs energy from the sun and the wind

c. it gathers energy from the water heated by the sun

d. turbines turn while absorbing the energy from the sun

15. What is the importance of putting springs in motorcycles?

a. the springs make the motorcycle lighter

b. the springs makes the motorcycle go faster

c. the springs make the motorcycle fuel-efficient

d. the springs serve as a shock absorber, making less bumpy

B. Directions: Use the words in the box to find which best fits the descriptions given below.

motor sound

mechanical energy turbine

solar panel visible light

16. The sum of kinetic energies in an object

17. The essential device in power plants that convert mechanical energy to electricity

18. The device that converts electricity back to mechanical energy

19. The only EM wave that is seen by naked eye.

20. A device that converts light to electricity.

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