Amplify Thermal Energy

If the molecules that make up a sample speed up, what else happens?

• the temperature of the sample increases

• the temperature of the sample decreases

• the temperature of the sample stays the same

• the molecules of the sample slow down

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

If the temperature of a rock is absolute zero, what would happen to the molecules?

• they would dissapear

• they would not be moving at all

• they would be moving very fast

• they would be moving very slowly

Tags

NGSS.MS-PS1-4

When things get hotter, their molecules are moving _________.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

If the temperature of a substance is hot, what are the molecules doing?

• they are moving very slowly

• they are not moving at all

• they are moving in a circular motion

• they are moving very fast

Tags

NGSS.MS-PS1-4

Which image shows the difference between the speed of molecules in hot and cold water?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-4

When a thing gets (a)   , its molecules are moving faster.

• warmer

• colder

• faster

• slower

Tags

NGSS.MS-PS1-4

Molecules in hot air move ________.

• fast

• slow

Tags

NGSS.MS-PS1-4

Claude is in the kitchen cooking and is going to stack one pan on top of another pan. The two pans are the same size and have the same number of molecules. The diagram above shows the pans now, before they touch each other. How does the temperature of the top pan compare with the temperature of the bottom pan now, and what will happen after the pans have been touching for a while?

• Before the pans touch, the bottom pan is hotter than the top pan. Once the pans are touching, the bottom pan will transfer kinetic energy to the molecules in the cooler top pan until both pans reach the same temperature, which will be in between their starting temperatures.

• Before the pans touch, the bottom pan is hotter than the top pan. Once the pans are touching, the cooler top pan will gain kinetic energy until the molecules in both pans have an energy of 70, because hotter things increase the temperature of cooler things.

• Before the pans touch, the bottom pan is cooler than the top pan. Once the pans are touching, the top pan will transfer kinetic energy to the molecules in the cooler bottom pan until both pans reach the same temperature, which will be in between their starting temperatures.

• Before the pans touch, the two pans are different temperatures. Once the pans are touching, both kinetic energy and cold energy will transfer between the molecules in the two pans until both pans reach the same temperature, which will be in between their starting temperatures.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

An architect is stacking pieces of plastic to make two columns in a model building. The diagram above shows the pieces of plastic before they touch each other. After they have been touching for a while, which of the two top plastic pieces will be cooler, and why?

• The larger top plastic piece will be cooler than the smaller top plastic piece. It started with more total energy, so less energy had to transfer for both pieces in the stack to reach the same total energy.

• The larger top plastic piece will be cooler than the smaller top plastic piece, because the energy that transferred to it was spread out over more molecules.

• Both pieces will be the same temperature, because both of the bottom pieces had the same amount of energy to transfer and the molecules in the top plastic start with the same energy.

• The smaller top plastic piece will be cooler than the larger top plastic piece, because less energy has to transfer for the molecules to reach the same temperature as the molecules of the bottom plastic.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Aki is playing cards and is about to put one card on top of another. Both cards are the same size and have the same number of molecules. The diagram above shows the cards now, before they touch each other.

How does the temperature of the top card compare with the temperature of the bottom card before the cards touch, and what will happen after the cards have been touching for a while?

• Before the cards touch, the top card is cooler than the bottom card. Once the cards are touching, the bottom card will transfer kinetic energy to the molecules in the cooler top card until both cards reach the same temperature, which will be in between their starting temperatures.

• Before the cards touch, the top card is hotter than the bottom card. Once the cards are touching, the cooler bottom card will gain kinetic energy until both cards’ molecules have an energy of 28, because hotter things increase the temperature of cooler things.

• Before the cards touch, the top card is hotter than the bottom card. Once the cards are touching, the top card will transfer kinetic energy to the molecules in the cooler bottom card until both cards reach the same temperature, which will be in between their starting temperatures.

• Before the cards touch, the two cards are different temperatures. Once the cards are touching, both kinetic energy and cold energy will transfer between the molecules in the two cards until both cards reach the same temperature, which will be in between their starting temperatures.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5