Grade 7 Physics Energy Quiz

What type of energy does a roller coaster have at the top of a hill?

• Kinetic energy

• Thermal energy

• Chemical energy

• Potential energy

How does the potential energy of a roller coaster change as it goes down a hill?

• Increases

• Remains constant

• Decreases

• Becomes kinetic energy

Explain how potential energy is converted into kinetic energy in a roller coaster.

• The coaster car gains potential energy when it goes through a loop and then converts it into thermal energy as it goes down the track.

• The coaster car gains potential energy when it goes up a hill and then converts it into sound energy as it goes down the track.

• The coaster car gains potential energy when lifted to a high point and then converts it into kinetic energy as it goes down the track.

• The coaster car gains potential energy when it goes down a hill and then converts it into light energy as it goes up the track.

What type of energy is stored in a spring when it is compressed or stretched?

• Kinetic energy

• Chemical energy

• Thermal energy

• Potential energy

How does the amount of elastic energy in a spring change when it is compressed more?

• Decreases

• Increases

• Stays the same

• Disappears

Describe the relationship between the amount of elastic energy in a spring and its stretch or compression.

• The amount of elastic energy in a spring decreases as its stretch or compression increases.

• The amount of elastic energy in a spring is inversely proportional to its stretch or compression.

• The amount of elastic energy in a spring has no relationship to its stretch or compression.

• The amount of elastic energy in a spring is directly proportional to its stretch or compression.

Which of the following is an example of a dependent variable in an experiment involving energy?

• Amount of energy produced or change in energy levels

• Color of the energy source

• Time it takes to conduct the experiment

• Temperature of the experiment room

In an experiment to investigate the energy transformation in a pendulum, what would be the dependent variable?

• Color of the pendulum

• Amount of potential and kinetic energy in the pendulum

• Length of the pendulum

• Material of the pendulum

Explain the energy transformation that occurs in a pendulum as it swings back and forth.

• Kinetic energy to potential energy and back to kinetic energy

• Potential energy to kinetic energy and back to potential energy

• Potential energy to heat energy and back to potential energy

• Potential energy to sound energy and back to potential energy

What type of energy is at its maximum when a pendulum is at its highest point?

• Chemical energy

• Thermal energy

• Potential energy

• Kinetic energy