11. Which of the following statements is
true about energy transformation?

A. Energy has only one form and cannot do many things.

B. Potential energy can be converted to kinetic energy and vice versa.

C. There is only one form of energy that exists, and it can transform into different forms.

12. In any energy transformation, what do we always produce?

A. Light

B. Electricity

C. Heat


13. Which of the following DOES NOT release heat to the environment?

A. water in a pail

B. boiling water

C. turning on the radio

14. Which of the following objects when used shows that electrical energy is transformed to heat?

A. fan

B. washing machine

C. flat iron

15. What energy transformation is present in the microwave oven?

A. electric energy to chemical energy

B. electrical energy to heat energy

C. electrical energy to mechanical energy

16. Which energy transformation occurs in an electric hair curler?

A. heat to light energy

B. electrical to heat energy

C. heat to electric energy

17. Which of the following shows that electrical energy is transformed into sound energy?

A. switching on incandescent light

B. using sunlight to dry clothes

C. playing the electric guitar

18. Which of the following is an example of sound energy being converted to heat energy?

A. electric clothes dryer

B. talking to someone using a cellphone

C. air conditioner

19. A television converts electrical energy into _________.

A. chemical, light and sound

B. light, sound and heat

C. sound, chemical and heat

20. A certain appliance underwent energy transformation as shown. What is this appliance?

A. electric fan

B. flat iron

C. laptop


pakisagutan po please need lng po talaga(个_个)​