Energy Test Review

Which of these transforms electrical current to heat energy?

• A toaster

• A Campfire

• A Baseball bat

• The sun

Lamar plugs a lamp into a wall. Electricity goes from the outlet through the cord and to the lightbulb. How is the energy transformed?

• Electrical energy to light and heat energy

• Light and heat energy to electrical energy

• Electrical energy to solar energy

• Heat energy to solar and light energy

Tags

NGSS.MS-PS3-5

Emily dropped a marble on a wood floor. It made a loud noise. Why did this happen?

• The marble’s energy transformed into electrical energy, causing the loud noise.

• The marble lost momentum as it fell to the floor. The change in momentum caused the noise.

• Some of the marble’s energy of motion was transformed to sound energy when the marble collided with the floor.

• All of the marble’s energy of motion was transformed to sound energy when the marble collided with the floor.

Tags

NGSS.MS-PS3-5

Moving energy from one place to another

• energy transfer

• energy transformation

• kinetic energy

• potential energy

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When energy is converted from one form to another, the total amount of energy

• never changes.

• decreases.

• changes slightly.

• increases.

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How does heat travel from one heated object to unheated object?

• The air over heated object travels to the other object and makes it warm.

• Some of the heat converts to radiation and travels to unheated object.

• Electrons within heated object started moving, distributing heat consistently in both objects.

• The molecular movement in heated object transfers heat energy to molecules in unheated object.

Tags

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Which type of energy is used to make an x-ray?

• Chemical

• Mechanical

• Radiation

• Thermal

Which statement is correct about insulators and conductors?

• Both insulators and conductors allow heat to flow easily through them.

• Neither insulators nor conductors allow heat to flow easily through them.

• Insulators allow heat to flow easily and conductors do not allow heat to flow easily.

• Insulators do not allow heat to flow easily and conductors do allow heat to flow easily.

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Why does the upper story of a house typically stay warmer than the lower story?

• The warm air expands and rises with convection.

• The warm air expands and sinks with convection.

• The warm air contracts and rises with conduction.

• The warm air contracts and sinks with conduction.

Tags

NGSS.MS-ESS2-5

As a roller coaster goes downhill

• kinetic energy is converted into potential energy.

• potential energy is converted into kinetic energy.

• electrical energy is converted into potential energy.

• potential energy is converted into electrical energy.

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