Remixed Quiz: Heat Transfer & Molecular Motion

Which statement best defines heat transfer by radiation?

• Heat moving through a solid material by atoms bumping into each other.

• Heat circulating through a liquid due to density changes.

• Energy traveling as electromagnetic waves, even through empty space.

• The transfer of cold energy to a hot object.

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You are holding a mug of hot coffee. Your hands start to feel warm. Which process is primarily responsible for transferring heat from the mug to your hands?

• A. Radiation

• B. Conduction

• C. Convection

• D. Evaporation

In a lava lamp, the colored "blob" rises when it gets hot and sinks when it cools down. This rising and sinking cycle is an example of:

• Conduction

• Radiation

• Convection

• Thermal Expansion

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How does thermal energy from a campfire reach your face if you are standing several feet away and the wind is blowing away from you?

• Through convection currents in the air.

• Through direct conduction with the air molecules.

• Through radiation waves traveling through the air.

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NGSS.MS-PS4-2

Which of the following best describes the molecular movement in a solid object as it gets hotter?

• The molecules expand and take up more space individually.

• The molecules vibrate faster and collide with their neighbors more often.

• The molecules slow down to conserve energy.

• The molecules break their bonds and fly apart immediately.

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Why is "vacuum" (empty space) a perfect insulator against conduction and convection?

• Because it is too cold for heat to move.

• Because it reflects heat like a mirror.

• Because there are no atoms or molecules to pass the energy along.

• Because gravity prevents the heat from rising.

Convection can only occur in fluids (liquids and gases), not in solid metal blocks.

• True

• False

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NGSS.MS-PS1-4

When heat is transferred via conduction, the atoms move from the hot end of the object all the way to the cold end.

• True

• False

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10. A student places a metal spoon, a wooden stick, and a plastic ruler into a bowl of hot water. Which object will heat up the fastest?

• Metal spoon

• Wooden stick

• Plastic ruler

• All will heat up at the same rate

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

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Radiation is electromagnetic waves.

• True

• False

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