Amplify Thermal Energy

What is the average amount of energy for these molecules?

• 10

• 80

• 8

• 800

Tags

NGSS.MS-PS1-4

Jason put an apple on top of an ice pack in his lunch bag. By lunchtime the temperature of his apple had decreased. What happened to the molecules in the apple when the temperature of the apple decreased?

• The energy of the molecules in the apple decreased.

• The cold energy of the molecules in the apple increased.

• The apple lost heat molecules.

• The energy of the molecules in the apple increased.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Geothermal power plants send water through pipes deep underground where it is hot. This causes the temperature of the water to increase.

What happens to the molecules of the water when the temperature of the water increases?

• The energy of the water molecules decreases.

• The energy of the water molecules increases.

• The cold energy of the water molecules decreases.

• More heat molecules combine with the water molecules.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Aditya is stacking some cups. The diagram above shows the cups before they touch each other. After the cups have been touching for a while, which of the two bottom cups will be cooler, and why?

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

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

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

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

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Molecules in a hotter sample will....

• have more kinetic energy

• be moving faster

• be moving slower

• be red in color

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1

There will always be heat transfer between two objects that are touching if...

• the temperatures are the same in each sample

• there is a difference in temperature between samples

Tags

NGSS.MS-PS1-4

Energy will always be transferred from the...

• hotter sample to the colder sample

• colder sample to the hotter sample

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When a hot and cold sample first come into contact with each other...

• all of the molecules in both samples will have the same kinetic energy

• some of the molecules in both samples will have a different kinetic energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of the following processes can amplify thermal energy in a system?

• A) Conduction

• B) Convection

• C) Radiation

• D) Insulation

Tags

NGSS.MS-PS3-3

In a solar thermal power plant, mirrors are used to focus sunlight onto a receiver. What is the primary purpose of this setup?

• A) To reduce the temperature of the receiver

• B) To amplify thermal energy by concentrating sunlight

• C) To convert thermal energy into chemical energy

• D) To disperse sunlight evenly

Tags

NGSS.MS-PS3-3