What effects the amount of elastic energy in an object?

Deformation (stretching/compression)

Which of the following is an example of energy conservation in a closed system?

A pendulum swinging without any air resistance

A car engine converting chemical energy into motion

A light bulb transforming electrical energy into light

A battery losing charge over time

In a coal burning power plant, coal is burned to heat water and create steam that moves a turbine connected to a generator. Choose all true statements.

CE in the coal increases TE of the water

ME (KE) of steam causes the turbine to have ME (KE)

ME (KE) of the turbine and generator creates ELE to be transferred to homes

TE in the coal is creates ELE in the turbine.

A tree is being cut down. There is a small branch that weighs 3 pounds and large piece of the trunk that weighs 80 pounds. Both pieces of wood have the same temperature. Which statement is true?

The branch has less TE than the piece of the trunk.

The branch has more TE than the piece of trunk.

The branch and piece of trunk have the same amount of TE.

Select all answers that are true about sound waves: Sound waves are...

the coordinated back and forth movement of particles.

atoms and molecules that move away from the source of a sound.

not transferred through matter.

When building a marble roller coaster, why did all the coasters have a starting point that was also the highest point in their track?

The high starting point provided the most GPE which would convert into more KE to make it through the track.

The high starting point provided the most KE which would convert into more GPE to make it through the track.

The high starting point gave the most provided the least amount of energy transferred to its surroundings.

Which bowling ball has the most kinetic energy?

A 16 pound bowling ball moving at 8 mph

An 8 pound bowling ball moving at 2 mph

A 16 pound bowling ball moving at 2 mph

An 8 pound bowling ball moving at 8 mph

On a cold day in January, you bring a snowball into the school and watch it melt. The snowball gained thermal energy. Where did this TE come from?

The air inside the school and the snow.

The TE was already inside the snowball.

A swing has potential energy if

unhooked and laying on the ground

What energy transformations take place when a battery operated radio is in use?

chemical to electrical to sound

electrical to chemical to sound

On a rollercoaster, where is maximum kinetic energy?

At the top of the hill ,where the car stops for a brief moment

Which of the following device transforms electrical energy into mechanical energy?

a manually operated pencil sharpener

What type of energy transformation in an electric hot plate is plugged in?

mechanical to electrical to light

Energy Unit!

Authored by Colin Brown

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7th Grade

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55 questions

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MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which forms of energy are potential?

ELE

Tags

NGSS.MS-PS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of energy is stored in a stretched rubber band?

Gravitational potential energy

Chemical energy

Elastic energy

Electrical energy

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

9 joules

18 joules

6 joules

12 joules

Tags

NGSS.MS-PS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of kinetic energy?

A book sitting on a table

Water held behind a dam

A rolling bowling ball

A compressed spring

Tags

NGSS.MS-PS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A tennis ball is dropped, bounces off the ground, and is caught. Choose the corrent sequence of energy transformations.

Tags

NGSS.MS-PS3-5

MULTIPLE SELECT QUESTION

45 sec • 1 pt

A tennis ball is dropped, bounces off the ground, and is caught. Which statements are true?

SE is transferred to the surroundings

TE is transferred to the surroundings

Some of the energy in the ball is transformed to TE

Some of the energy in the ball is transformed to CE

GPE is transferred to the surroundings

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When a baseball is hit with a bat...

SE is transferred to the surroundings

KE is transformed to SE in the ball

Tags

NGSS.MS-PS3-5

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Energy Unit!

Which forms of energy are potential?

What type of energy is stored in a stretched rubber band?

Which of the following is an example of kinetic energy?

A tennis ball is dropped, bounces off the ground, and is caught. Choose the corrent sequence of energy transformations.

A tennis ball is dropped, bounces off the ground, and is caught. Which statements are true?

When a baseball is hit with a bat...

During photosynthesis, what type of energy transformation occurs?

Energy cannot be created or destroyed, but it can be transformed into a different form OR transferred to a different object.

Electrical energy is the flow of electrons. Electrons flow easier through...

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