PS - Unit 8: Flow of Energy

What type of heat transfer does a fire create to keep mosquitoes away?

• convection

• polarization

• radiation

• conduction

Tags

NGSS.MS-PS3-3

A solar power plant transfers (a)   energy into (b)   energy so that you can charge your cell phone.

• solar
• electrical
• mechanical

• thermal

Arturo is heating a pot of water on the stove. When heating water by convection, which hypothesis describes the process? As particles are heated,

• A. energy is transferred as more energetic particles MOVE from one place to another.

• B. energy is transferred to neighboring particles by COLLISIONS of particles.

• C. energy is transferred by gas bubbles within a liquid.

• D. energy is transferred by electromagnetic WAVES.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Zae and Azia are at camp. Zae has the top bunk of the bunk beds and keeps complaining about it being hot, while Azia is on the bottom bunk and is too cold. What explains this difference of temperature within the same room? Heat transfer always changes temperature when it flows

• Hot air is more dense and sinks to the floor.

• Cold air is less dense and sinks to the floor.

• Hot air is less dense and rises to the ceiling.

Tags

NGSS.MS-PS1-4

Which describes converting chemical energy to mechanical energy?

• a chair sitting still

• a leaf absorbing sunlight

• a person jogging on the track

• a rock hitting the ground

Ja'Darrian is heating a pot of water on the stove. What happens to the water as it gains heat from the stove?

As heat is added, the water particles become:

• more energized weakening the attraction between water molecules allowing the water to change phases.

• less energized strengthening the attraction between water molecules keeping the water from changing phases.

• more energized strengthening the attraction between water molecules keeping the water from changing phases.

• less energized weakening the attraction between water molecules allowing the water to change phases.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

During a science experiment, Ja'Mari observes the heating curve of water. At which point does water change from a solid to a liquid?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-4

During the same science experiment, Jacaden observes the heating curve of water just like Ja'Mari. But Jacaden notices that liquid water starts to evaporate and turn into a gas at which point on the graph?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-4

Alyssa and Kolbi are playing with a wind-up toy. After winding the mechanism, how does energy transfer in the toy?

• Thermal energy in the wind up becomes chemical energy for the feet.

• Chemical energy in the wind up becomes potential energy for the feet.

• Kinetic energy in the wind up becomes thermal energy for the feet.

• Potential energy in the wind up becomes mechanical energy for the feet.

Tags

NGSS.MS-PS3-5

Andrew is planning to cook a grilled cheese sandwich and wants a pan that heats up slowly and retains heat for a long time. According to the data which pan should he choose?

• ceramic

• copper

• glass

• iron