Energy practice

Which statement best describes heat and thermal energy?

• They are different words for the same thing.

• They represent different concepts.

• Heat is what happens when thermal energy stops moving between substances.

• Thermal energy is what happens when heat moves between substances.

Tags

NGSS.MS-PS3-4

Cindy pours cool milk into a hot bowl of oatmeal and then stirs it with a room-temperature spoon. Which substance will have heat flow from it to the other substances?

• the milk

• the spoon

• the oatmeal

• the surrounding air

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of these actions would increase heat transfer between two objects?

• establishing their thermal equilibrium

• increasing the area of their contact

• using objects with similar specific heats

• reducing the time of their contact

Which shows the temperatures of three substances, in order, from greatest to least?

• water vapor, ice, water

• ice, water, water vapor

• water, water vapor, ice

• water vapor, water, ice

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which shows the formula for converting from kelvins to degrees Celsius?

• °C = (9/5 × K) +32

• °C = 5/9 × (K – 32)

• °C = K – 273

• °C = K + 273

Which is equal to a temperature of 20°C?

• 20°F

• 68°F

• 36°F

• 32°F

At which temperature does water have particles with a greater average kinetic energy than water with a temperature of 30°C?

• 77°F

• 95°F

• 280K

• 300K

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What causes the air above a pot of boiling water to become warm?

• The air transfers thermal energy to the water vapor.

• The water vapor transfers thermal energy to the air.

• The particles in the air lose kinetic energy.

• The particles in the water vapor gain kinetic energy.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which best describes a difference between energy transformations in power plants and dams?

• Only power plants use fossil fuels to transform energy.

• Only dams use fission to generate thermal energy.

• Only power plants use water to turn turbines.

• Only dams use mechanical energy to produce electricity.

Hedea made a study chart about nuclear energy.

Which best describes the error in Hedea’s chart?

• The nuclei of atoms are split apart in both fission and fusion.

• The nuclei of atoms are joined together in both fission and fusion.

• Fission converts nuclear energy to electrical energy, not thermal energy.

• Fission and fusion convert nuclear energy to both radiant and thermal energy.

Tags

NGSS.HS-PS1-8