Energy and waves Review

The diagram shows a flashlight that shines brightly when it is turned on. Which BEST describes the energy transformation within the flashlight?

• electrical energy → chemical energy → light energy

• chemical energy →electrical energy → light energy

• thermal energy → chemical energy → light energy

• light energy→ electrical energy → chemical energy

Which best describes the molecular motion of the water particles as the burner supplies heat? The molecular motion will increase as less thermal energy is absorbed. The molecular motion will decrease as less thermal energy is absorbed. The molecular motion will increase as more thermal energy is absorbed. The molecular motion will decrease as more thermal energy is absorbed

• The molecular motion will increase as less thermal energy is absorbed.

• The molecular motion will decrease as less thermal energy is absorbed.

• The molecular motion will increase as more thermal energy is absorbed.

• The molecular motion will decrease as more thermal energy is absorbed

Tags

NGSS.MS-PS1-4

Solar power changes light from the Sun into a form of energy that can be used to heat homes and run household appliances. Which of the following shows the correct energy transformation.

• Thermal energy → mechanical energy

• Electrical energy → potential energy

• Light energy → electrical energy

• Chemical energy→ mechanical energy

A student places a skillet on a stove. After heating for 10 minutes, the student removes the skillet from stove. Which describes the kinetic energy of the molecules in the skillet during the investigation?

• The kinetic energy remains the same.

• The kinetic energy increases and then decreases.

• The kinetic energy decreases and then increases.

• The kinetic energy constantly increases.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which best explains how roasting marshmallows happens?

• Heat from the fire is conducted to the marshmallow.

• The coolness of the marshmallow is conducted to the fire.

• Heat from the fire is radiated to the marshmallow.

• The coolness of the marshmallow is radiated to the fire.

Where does the ball have the greatest potential energy?

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS3-2

A wave is…

• A wrinkle in time

• A disturbance that carries energy

• An energy that carries disturbances

• Any object moving through space

Tags

NGSS.MS-PS4-1

A longitudinal wave is one where...

• The force used to make the wave moves parallel to the waves motion

• The force used to make the wave moves perpendicular to the waves motion

• The wave can travel through empty space

• The wave cannot travel through empty space

A transverse wave is one where…

• The force used to make the wave moves parallel to the waves motion

• The force used to make the wave moves perpendicular to the waves motion

• The wave can travel through empty space

• The wave cannot travel through empty space

The frequency of a wave is…

• Is how many waves pass each second

• Is measured in Hertz

• Is effected by the wavelength and the speed of the wave

• Both A and C

• All of the above

Tags

NGSS.HS-PS4-1