6.2 Thermal Energy Final Assessment

What happens to the particles of a liquid as it cools down in a container?

• The particles move faster and spread apart.

• The particles move slower and come closer together.

• The particles remain at the same speed and distance.

• The particles evaporate and disappear.

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How does a thermos container keep hot liquids hot and cold liquids cold?

• By reducing heat transfer

• By increasing heat transfer

• By changing the liquid's temperature

• By using electricity

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The tightness of a lid matters in keeping beverages hot or cold in a container because:

• It prevents heat transfer between the inside and outside of the container.

• It allows air to circulate, maintaining the temperature.

• It has no effect on the temperature of the beverage.

• It only affects the taste of the beverage.

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Cups with added layers are more effective in thermal energy transfer because:

• they increase the surface area for heat exchange.

• they provide better insulation.

• they allow more heat to escape.

• they are made of conductive materials.

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What is a characteristic of a closed system?

• A closed system does not allow matter to enter and/or exit.

• A closed system allows only energy to enter and exit.

• A closed system allows both matter and energy to enter and exit.

• A closed system does not allow energy to enter or exit.

What happens to the temperature inside a closed cup system when exposed to a warmer environment outside?

• The temperature inside decreases.

• The temperature inside remains the same.

• The temperature inside increases.

• The temperature inside fluctuates.

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Kinetic energy plays a role in determining the state of matter of liquids and gases by:

• Increasing the temperature and causing a change in state

• Decreasing the temperature and causing a change in state

• Having no effect on the state of matter

• Only affecting solids

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The particles in hot liquids move faster than particles in cold liquids because:

• they have more energy.

• they are larger in size.

• they are less dense.

• they are more numerous.

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How does light interact with a closed cup system to cause temperature changes?

• Light reflects off the surface, causing no temperature change.

• Light transmits through the cup, causing a decrease in temperature.

• Light is transmitted through a clear plastic cup, causing an increase in temperature.

• Light is absorbed and then transmitted, causing no temperature change.

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What is important to define in the engineering process of designing a thermal cup?

• Deciding the best style and pattern to create on the outside of the thermal cup.

• Determining how to minimize, or reduce, thermal energy transfer.

• Determining how much liquid can fit inside the thermal cup.

• Determining the cost of the thermal cup

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