transformation of energy

In a hair dryer, the electrical energy changes into... and...

• 
  light-sound

• sound - thermal

• thermal - light

• kinetic - light

In a solar panel, sunlight is converted into...

• mechanical energy

• chemical energy

• thermal energy

• electrical energy

Which of the following devices converts electrical energy into mechanical energy?

• fan

• light bulb

• battery

• heater

In the washing machine, the ............................energy changes into kinetic and sound
energies

• 
  a. light
  
  

• b. electrical

• c. thermal

• d. potential

Plants can convert the light energy from the Sun into............energy which is stored inside the plant in the form of sugar

• a. sound

• b. electrical

• c. chemical

• d. kinetic

3. You feel warm when you rub your hands together, because
......................energy changes into thermal energy.

• a. kinetic
  
  
  

• b. light

• c. electrical

• d. sound

5. Electric wires are made of.......................

• a. copper.

• b. paper

• c. wood.

• d. glass.

7. Which form of energy is not used or produced when you turn on an electric

bulb?

• a. Electrical.

• b. Light.

• c. Thermal.

• d. Sound.

energy cannot convert from one form to another.

• true

• false

most wasted energy in electric devices in form of ......................

• sound

• heat

• light

• mechanical