Unit 2 Review

How does applying more stored energy to a device, such as a pom-pom launcher, affect its energy of motion?

• As the stored energy is increased, the energy of motion is increased.

• As the stored energy is increased, the energy of motion is decreased.

• As the stored energy is increased, the energy of motion stays the same.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Turning a flashlight on is an example of energy transformation. Chemical energy from the batteries changes to ________ energy that flows to the lightbulb. The lightbulb changes ________ energy into ________ energy.

• mechanical, mechanical, kinetic

• thermal, thermal, light

• electrical, electrical, light

• sound, sound, nuclear

Tags

NGSS.MS-PS3-5

A student made the circuit in the drawing below. Which does the student need to add to the circuit to make it work?

• Another battery

• A switch

• Another wire

Based on the student’s observations, what can you conclude about the transfer of stored energy to sound energy when plucking a guitar string?

• The harder you pluck, there will be less vibration and a quieter sound.

• The harder you pluck, there will be more vibration and a louder sound.

• The sound doesn’t change with the amount of force applied.

• The string will not make any sound if you pluck it harder.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS4-1

According to the data in the table, what connection can you make between the number of blades on a windmill and the time it takes to lift a paperclip?

• The amount of blades does not affect the speed.

• The fewer blades, the faster the paper clip lifted.

• The more blades, the faster the paper clip lifted.

• The more blades, the slower the paper clip lifted.

Reread this scenario: A student designs windmills with different numbers of blades and uses a fan to spin the blades of the windmill in order to pick up a paperclip. The student then measures the amount of time it took to lift the paperclip. The energy of the motion from the fan was transferred to the blades, which moved the paper clip. Is this statement true or false?

• True

• False

Tags

NGSS.MS-PS3-5

Use the table to answer the question below. How do you lift the paperclip faster using the windmill?

• Make the blades smaller.

• Subtract blades from the windmill.

• Add more blades to the windmill.

• Use a heavier paperclip.

Tags

NGSS.MS-ETS1-4

NGSS.MS-PS2-1

Which number shows the picture of a nonrenewable resource?

• 1

• 3

• 4

What is one negative effect of using nonrenewable resources to create energy?

• Nonrenewable resources take so long to form that they cannot be replaced quickly.

• Nonrenewable resources are so plentiful in nature, that they can be used without worry.

• Nonrenewable resources cause no pollution to the environment, so they are the best kind to use.

Tags

NGSS.HS-ESS3-4

NGSS.HS-ESS3-6

Lilly learned that fossil fuels contain a lot of energy. Why are fossil fuels considered nonrenewable resources?

• Fossil fuels are essential to civilization.

• Fossil fuels cannot be replaced fast enough for future use.

• Fossil fuels are easily renewed.