Unit 2 Lesson 2 Quiz

An ice cube is palced in a glass of warm tea. Later, the ice has melted, the tea is cooler. What is true about the transfer of energy?

• Heat has been transferred from the ice cube to the warm tea.

• Light energy from the warm tea has been transferred to the ice cubes.

• Heat from the warm tea has been transferred to the ice cubes and the glass.

• Electrical energy has been transferred from the tea to the surrounding air and glass.

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What energy transfer occurs in a solar panel?

• Heat is transferred to the panel when it is connected to an electrical source.

• Electrical energy is transferred to the panel when it is connected with an electrical source.

• Energy is transferred to the panel when light waves from the sun are absorbed by the panel.

• Mechanical energy is transferred to the panel when waves from the sun push against the panel and move it.

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Which of these is an example of how heat can transfer by conduction?

• the sun heating a pond

• snow melting on a hot day

• a person keeping warm by a fire

• warming your hands on a cup of hot chocolate

Which of these is an example of how heat can transfer by convection?

• heat moving throughout a bedroom

• burning your hand on a hot pan

• a person keeping warm by a fire

• warming your hands on a cup of hot chocolate

Which of these is an example of how heat can transfer by radiation?

• heat moving throughout a bedroom

• burning your hand on a hot pan

• a person keeping warm by a fire

• the sun warming sand at the beach

Through which of these materials do sound waves travel most slowly?

• air

• iron

• wood

• water

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Through which of these materials do sound waves travel most quickly?

• Solids

• Liquids

• Gases

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Which form of energy results from vibrations that travel through air?

• sound energy

• potential energy

• electrical energy

• chemical energy

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Each cup is filled with water and has a thermometer in it.

Which cup of water has the most energy?

• 1

• 2

• 3

• 4

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Solar cookers are used to heat food using the sun's energy. Describe the energy transformations that occur when using a solar cooker. Include all forms of energy that are involved.

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