Compare and Contrast Energies

Which of the following best describes kinetic energy?

• energy due to position or height

• energy stored within chemical bonds

• energy of motion
• energy stored by stretching or compressing

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When you eat food and then run, which type of energy transformation is primarily occurring?

• chemical to kinetic
• gravitational to kinetic

• elastic to kinetic

• kinetic to chemical

When a ball is thrown into the air and then starts to come back down what happens to the gravitational potential energy? It is converted into what type of energy?

• chemical energy

• gravitational energy

• elastic energy

• kinetic energy

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How does distance (or height) affect an object's potential energy?

• Potential energy increases with height.

• Potential energy decreases with height.

• Potential energy remains constant regardless of height.

• Potential energy is not affected by height.

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NGSS.MS-PS3-2

Study the diagram of the roller coaster below. Where is the kinetic energy the greatest?

• At the highest point of the roller coaster

• At the lowest point of the roller coaster

• At the midpoint of the roller coaster

• At the starting point of the roller coaster

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NGSS.MS-PS3-1

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Compare the energies found in each of the situations below. Which situations best describe kinetic energy? Select the THREE correct answers.

• a bobsled moving at its fastest speed around the final turn

• a baseball released by the pitcher

• a swimmer in the middle of a 50-meter race

• a diver standing on the edge of the 30-meter diving platform

• a basketball sitting on the rim before falling into the hoop

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NGSS.MS-PS3-1

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In a science class, students participate in an experiment where they use rubber bands to shoot at a stack of cups to knock them over. Each student stretches a rubber band between their fingers, aims, and releases it to hit the cups. Which statements correctly describe the types of energy involved and their transformations? Select the THREE correct answers.

• The stretched rubber band stores elastic potential energy, which is converted into kinetic energy when it is released.

• When the rubber band is stretched, gravitational potential energy is increased.

• As the rubber band is released and flies toward the cups, its elastic potential energy is transformed into kinetic energy.

• The cups fall due to gravitational potential energy being converted into kinetic energy as they move downward.

• The movement of the rubber band through the air demonstrates the conversion of chemical energy into kinetic energy.

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NGSS.MS-PS3-2

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Elastic potential energy is converted into kinetic energy during the launch. How could you modify the slingshot to increase the potential energy for a farther launch?

• By using a stronger elastic band

• By reducing the mass of the object

• By shortening the length of the slingshot

• By using a lighter frame for the slingshot

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Compare and contrast the energies found in the following experiments: lifting a ball to a height and releasing it, bouncing a flexible rubber ball off the ground, and powering a toy car with batteries.

• All experiments involve only potential energy.

• All experiments involve only kinetic energy.

• The first two experiments involve gravitational potential energy, while the third involves chemical energy.

• The first experiment involves chemical energy, the second involves elastic potential energy, and the third involves gravitational potential energy.

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NGSS.MS-PS3-2

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Which of the following best describes kinetic energy?

• energy due to position or height

• energy stored within chemical bonds

• energy of motion
• energy stored by stretching or compressing

Tags

NGSS.MS-PS3-1