Grade 8 Physics Quiz: Potential and Kinetic Energy

How does the gravitational potential energy of an object change as it moves higher above the ground?

• Increases

• Becomes zero

• Remains the same

• Decreases

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NGSS.MS-PS3-2

What are the factors that affect the elastic potential energy of a stretched spring?

• Color of the spring and material it is made of

• Spring constant and amount of stretch or compression

• Length and width of the spring

• Temperature and humidity of the environment

What type of energy is possessed by a compressed or stretched object?

• Thermal energy

• Kinetic energy

• Chemical energy

• Potential energy

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NGSS.MS-PS3-2

Michael, Ethan, and William are studying physics. They are discussing about mechanical energy. Can you help them define mechanical energy and provide a real-world example of it?

• Mechanical energy is the energy possessed by an object due to its motion or position. An example of mechanical energy is a car moving down the street.

• Mechanical energy is the energy possessed by an object due to its color. An example of mechanical energy is a red apple on Ethan's desk.

• Mechanical energy is the energy possessed by an object due to its temperature. An example of mechanical energy is the hot cup of coffee that William just made.

• Mechanical energy is the energy possessed by an object due to its sound. An example of mechanical energy is the loud speaker at Michael's house.

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Explain the relationship between an object's mass and its kinetic energy.

• Kinetic energy is only related to the speed of an object, not its mass.

• Mass has no effect on an object's kinetic energy.

• Kinetic energy is inversely proportional to the mass of an object.

• Kinetic energy is directly proportional to the mass of an object.

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NGSS.MS-PS3-1

What is the energy stored in the bonds of chemical compounds called?

• Thermal energy

• Kinetic energy

• Mechanical energy

• Potential energy

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NGSS.MS-PS1-5

Give an example of a chemical reaction that releases energy in the form of heat.

• Mixing baking soda and vinegar

• Freezing water

• Combustion of wood

• Boiling water

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What type of energy is produced by the flow of electric charge?

• Magnetic energy

• Thermal energy

• Electrical energy

• Sound energy

Explain how a nuclear power plant generates electricity.

• Nuclear power plants use wind energy to generate electricity

• Nuclear power plants rely on solar panels to produce electricity

• Nuclear power plants convert water directly into electricity

• Nuclear reactions produce heat to generate steam and drive turbines

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NGSS.MS-PS3-4

What type of energy is associated with the movement of charged particles?

• Sound energy

• Thermal energy

• Kinetic energy

• Potential energy

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