Energy Transfers

For a flashlight to turn on, chemical energy from the batteries changes to electrical energy that flows to the lightbulb. The lightbulb changes electrical energy into light energy. What is this an example of?

• energy transfer

• energy exchange

• energy being destroyed

• energy being created

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A child hitting a drum creates vibrations that produce

• sound energy

• electrical energy

• light energy

• thermal energy

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The Sun transfers what type of energy?

• electrical and sound

• light and thermal

• sound and nuclear

• chemical and sound

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Identify the statement that correctly explains what happens when energy transfers in a system.

• About 75% of the energy is transferred, while the rest is destroyed.

• All of the energy is transferred in different amounts to different forms.

• Half of the energy is transferred in different amounts to different forms.

• Some of the energy gets transferred, while a portion is lost along the way

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Electrical energy is transferred when an iron is plugged into an outlet. What type of energy does the electrical energy become?

• sound

• light

• thermal

• nuclear

Thermal energy is

• the internal energy of an object due to the kinetic energy of its particles

• the external energy of an object due to its potential energy

• the internal energy of an object due to the stored energy of its particles

• the external energy of an object due to its exposure to the Sun

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When a person plucks the string on a guitar, ___________energy is transferred.

• light

• thermal

• sound

• electrical

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Which statement is true?

• A lamp changes heat energy to electrical energy

• A lamp changes light energy to electrical energy.

• A lamp changes electrical energy to light and heat energy.

• You cannot change energy from one form to another

Tags

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