Energy conversion

The picture showing the energy conversion. Which picture represent the correct energy conversion?

Chemical energy → Heat energy + light energy

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Explain the energy conversion when you plug in a stereo and listen to music.

• Electrical energy ---> Kinetic energy

• Chemical energy ---> Heat energy

• Electrical energy ---> Sound energy

• Potential energy ---> Sound energy

State the energy conversion when you burn wood for a fire

• Electrical energy ---> Heat energy

• Light energy ---> Kinetic energy

• Chemical energy ---> Light energy + Heat energy

• Chemical energy ---> Electrical energy

Describe briefly the energy conversion when you put batteries in a flashlight to make it switched on.

• Chemical Potential energy ---> Light energy + Heat energy

• Light energy ---> Kinetic energy + Heat energy

• Chemical Potential energy ---> Potential energy

• Chemical Potential energy ---> Electrical energy

Which letter has the most gravitational potential energy?

• Letter H

• Letter E

• Letter M

• Letter Y

Name the energy conversion that occurs when Charlie rides his skateboard up to the top of the ramp. (Look closely to where the arrow is pointing.)

• Chemical potential energy → Gravitational potential energy

• Electrical energy → Light energy

• Gravitational potential energy → Kinetic energy

• Heat energy → Electrical energy

What is the main energy changes that take place when a dryer machine is switched on?

• Chemical potential energy → Light energy

• Electrical energy → Chemical potential energy

• Gravitational potential energy → Sound energy + Heat energy

• Electrical energy → Heat energy + Kinetic energy + Sound energy

As a ball rolls from the top of a hill to the bottom, how does its potential and kinetic energy change?

• Potential energy and kinetic energy both decrease

• Potential energy increases and kinetic energy decreases

• Potential energy and kinetic energy both increase

• Potential energy decreases and kinetic energy increases

As the height of an object increases, the ___________ energy of the object increases.

• kinetic energy

• potential energy

• heat energy

• sound energy

As the apple is falling down from a tree, the _____________ energy of the apple is decreasing.

• kinetic energy

• gravitational potential energy

• kinetic energy and gravitational potential energy

• sound energy