7.7A , 7.7C , 6.8A 6.8B - 8th Grade Review

In an outdoor plant, the process of photosynthesis converts carbon dioxide and water to glucose and oxygen. How is energy conserved within this system during this process?

• Thermal energy from the Sun transforms into light energy that is given off by the plant.

• Light is transformed into chemical and heat energy as the plant gets warmer in the sunlight.

• Chemical energy is transformed into mechanical energy as the plant grows.

• Radiant or light energy is transformed into chemical energy.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of these statements correctly describes energy transformation when a wooden log burns in a fireplace?

• A. Chemical energy is transformed into potential energy.

• B. Chemical energy is transformed into thermal energy and light energy.

• C. Thermal energy and light energy are transformed into potential energy.

• D. Thermal energy and light energy are transformed into chemical energy.

Tags

NGSS.MS-PS1-2

Which of these descriptions of how the basketball behaves correctly explains the kinetic energy of the basketball?

• The kinetic energy is not transformed into any other energy forms.

• The kinetic energy is conserved after each bounce, so it remains the same.

• The kinetic energy decreases after each bounce because some of it is transformed to other forms of energy.

• The kinetic energy increases after each bounce because other forms of energy are transformed to kinetic energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

NGSS.MS-PS3-4

Over time, the battery loses power and the bulb dims. Finally, it goes out. What happened to the energy?

• The battery creates new energy.

• There is no energy being transformed by the system.

• Energy is being destroyed by the system.

• Energy is leaving the system in the form of light and heat.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

At what point will the roller coaster car have transformed the greatest amount of gravitational potential energy into kinetic energy? Pick the ONE correct answer.

• W

• X

• Y

• Z

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NGSS.MS-PS3-2

NGSS.MS-PS3-5

NGSS.MS-PS3-4

As the car moves down the slope, the amount of ___ energy decreases while the amount of ___ energy increases.

• kinetic; potential

• potential; kinetic

• mechanical; kinetic

• thermal; potential

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NGSS.MS-PS3-2

NGSS.MS-PS3-5

Choose the correct path by which energy is transferred through the roller coaster. Between Point W and Point Z, the total amount of energy in the car –

• stayed the same; it gained gravitational potential energy but lost kinetic energy.

• stayed the same; it lost gravitational potential energy but gained kinetic energy.

• changed; it gained gravitational potential energy and gained kinetic energy.

• changed; it lost gravitational potential energy and lost kinetic energy.

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NGSS.MS-PS3-2

NGSS.MS-PS3-5

NGSS.MS-PS3-4

Which of the following are true statements?

• Some energy is lost as heat into the environment.

• The difference in the beginning amount of energy between producers and decomposers is 970 kcal.

• Energy is destroyed when the producers are eaten.

• Energy is conserved because of the law of conservation of energy.

• Decomposers consume the highest amount of energy.

Tags

NGSS.MS-LS2-3

Based on the path traveled, at which position would the ball have the greatest kinetic energy and least potential energy?

• Position 1

• Position 2

• Position 3

• Position 4

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NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

At which point is Marshall's greatest gravitational potential energy the greatest?

• Point A

• Point B

• Point C

• Point D

Tags

NGSS.MS-PS3-2

NGSS.MS-PS2-4