Thermal Energy Mid Point

What does each box in the diagram represent?

• A molecule

• An object

• An atom

• A cell

Tags

NGSS.MS-PS1-1

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, both pans have the same temperature. Once the pans are touching, there will be no change in temperature as they are already equal.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

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, both cards have the same temperature. Once the cards are touching, there will be no energy transfer as they are already at the same temperature.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Maja puts a hockey puck onto ice. After a while the temperature of the hockey puck decreases. What happens to the molecules of the hockey puck when the temperature of the puck decreases?

• The hockey puck loses heat molecules.

• The energy of the molecules in the hockey puck decreases.

• The energy of the molecules in the hockey puck increases.

• The cold energy of the molecules in the hockey puck increases.

Tags

NGSS.MS-PS1-4

Which choice for the top pancake would make the bottom pancake the warmest?

• Choice A

• Choice B

• Choice C

• None of the above

Tags

NGSS.MS-PS3-3

Which choice for the top pancake has the lowest energy level?

• Choice A

• Choice B

• Choice C

• All have the same energy

Which energy level is considered low energy according to the diagram?

• 5

• 10

• 15

• 20

Tags

NGSS.HS-PS3-4

What is the effect of placing a high energy pancake on a low energy pancake?

• The high energy pancake cools down

• The low energy pancake heats up

• Both pancakes remain unchanged

• The low energy pancake cools down

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3

All atoms are vibrating, hot atoms have more energy. When hot atoms bump into cold atoms they transfer energy.

• True
• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What happens to the energy levels when two objects at different temperatures are placed in contact?

• Energy disappears from both objects.

• Energy transfers from the cooler object to the hotter object until equilibrium is reached.

• Energy transfers from the hotter object to the cooler object until equilibrium is reached.

• The energy levels of both objects remain unchanged.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3