Lesson 5 Check for Understanding Part 1

What happens when there is an equal amount of energy that is transferred to and from two objects?

• The temperature of the objects will stay the same.

• The temperature of the objects will continue to rise.

• The temperature of the objects will continue to cool.

• The temperature of one object will cool, while the other will rise.

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Which of these is an example of a substance depositing?

• molten metal cooling from a liquid into a solid

• water droplets transforming into hail during precipitation

• water vapor transforming into crystals in the atmosphere

• carbon dioxide solid (dry ice) transforming into carbon dioxide gas

At high temperatures, the particles of matter

• move very slowly.

• move very quickly.

• clump together.

• move in circular patterns.

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Thermal energy that is transferred from a warmer object to a cooler object is called ________.

• evaporation

• heat

• motion

• temperature

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Substances that sublimate

• change from a solid to a gas.

• do not enter a liquid state at all.

• do not melt when they gain thermal energy.

• all of the above

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Which of these has the most thermal energy?

• a cup full of warm water

• a bucket full of lukewarm water

• a pond full of cool water

• a bottle full of hot water

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Fast-moving particles have:

• less thermal energy and higher temperatures than slow-moving particles.

• less thermal energy and lower temperatures than slow-moving particles.

• more thermal energy and lower temperatures than slow-moving particles.

• more thermal energy and higher temperatures than slow-moving particles.

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The particles of a substance begin to condense when energy is:

• lost at the substance’s melting point.

• gained at the substance’s boiling point.

• lost at the substance’s boiling point.

• gained at the substance’s melting point.

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Why does a cup of boiling water have more kinetic energy than a bowl of water, but less thermal energy?

• The speed of molecules in the cup is slower, and there are fewer total molecules.

• The speed of molecules in the cup is faster, but there are fewer total molecules.

• The speed of molecules in the cup is faster, and there is a greater amount of molecules.

• The speed of molecules in the cup is slower, but there is a greater amount of molecules.

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What determines the amount of thermal energy that is needed in order for a substance to change state?

• the source that is being used to heat a substance

• the difference in energy transferred between two substances

• the strength of attraction between particles in a substance

• the number of atoms and molecules in a sample of a substance

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