MS PS3 4

If this sample of gas was heated, draw the new graph.

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What are the similarities and differences between these two graphs?

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Answer explanation

They both show the distribution of particles and kinetic energy. They have the same overall shape.

The hot sample is more flat, showing a higher value for the average kinetic energy. Meaning the temperature is hotter.

The cold sample is less flat, showing a lower value for the average kinetic energy. Meaning the temperature is colder.

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The condition where two substances in physical contact with each other exchange no heat energy. They are said to be the same temperature.

• Thermal Energy

• Cooler to Warmer

• Energy Transfer

• Thermal Equilibrium

Two objects have different temperatures. Object A has a temperature of 42 degrees and Object B is 37 degrees. Which direction should the energy transfer between Objects A and B?

• From Object A to Object B

• From Object B to Object A

• Energy will not transfer

• Energy will transfer both directions

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Johnny put ice in his water. Which idea do you think best explains why the water got cold?

• The coldness from the ice moved into the water

• The coldness and the heat moved back and forth until the water cooled off.

• The heat from the water moved into the ice.

• The water does not cool of

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Heating will continue until what is reached?

• Energizers

• Equilibrium

• Equality

• Energy

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Choose the correct statement.

Please read carefully!!

• Energy can be created and destroyed. Therefore, as energy disappears, it goes in one part of the system as it jumps in another part of the system.

• Energy isn’t created or destroyed. Therefore, as energy transfers, it increases in one part of the system as it decreases in another part of the system.

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NGSS.MS-PS3-5

An air conditioner uses machines and chemicals to remove kinetic energy from the molecules that make up the air inside a room. This _______ the molecules ______ and _______ the room’s air temperature.

• This slows the molecules down and lowers the room’s air temperature.

• This increases the molecules up and increases the room’s air temperature.

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When two things are in contact, their molecules collide, and kinetic energy transfers from the faster-moving molecules to the slower-moving molecules.

• true

• false

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Is the following statement true or false?

Energy isn’t created or destroyed.

• True

• Flase

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