7.P.2.2

Look at the drawing of the ball bouncing below.
Which of the following is the correct sequence of words to use to indicate the different types of energy shown in the drawing?

• kinetic, potential, potential, kinetic
• potential, kinetic, kinetic, potential
• potential, kinetic, potential, kinetic
• potential, potential, kinetic, kinetic

Biodiesel is an alternative to gasoline that is produced from fats or oils such as soybean oil or restaurant grease. Although it is better for the environment than gasoline, it has lower fuel efficiency. What most likely causes the biodiesel to be less efficient than gasoline?

• Biodiesel has lower potential energy therefore releases less kinetic energy.
• Biodiesel has higher potential energy therefore releases less kinetic energy.
• Gasoline has lower potential energy therefore releases less kinetic energy.
• Gasoline has higher potential energy therefore releases less kinetic energy.

What kind of energy change occurs when a battery is operating a remote control toy?

• Heat energy is changed to light energy.
• Light energy is changed to heat energy.
• Potential energy is changed to kinetic energy.
• Kinetic energy is changed to chemical energy.

A student pushed a rock from the top of a hill.
What type of energy change occurred after the rock was pushed?

• Heat energy was converted to potential energy.
• Electrical energy was converted to heat energy.
• Potential energy was converted to kinetic energy.
• Kinetic energy was converted to electrical energy.

Riding a bicycle produces several forms of energy. Which form of energy is produced in the greatest amount by pedaling a bicycle down the sidewalk?

• chemical
• radiant
• kinetic
• sound

In a gasoline-powered car, chemical energy from gasoline is transformed to make the car move. The motion of the car is what form of energy?

• radiant energy
• nuclear energy
• electrical energy
• mechanical energy

The picture shows a can opener being operated.

Which form of energy is most likely used to open the can?

• thermal
• chemical
• electrical
• mechanical

Angela has a toy made out of a coil of wire. She places the toy at the top of some stairs. The toy can travel down each step, end-over-end.
Which type of energy does the toy have when it is placed at the top of the stairs?

• electric
• kinetic
• magnetic
• potential

Which energy conversion happens when a person shivers and the energy is transferred to make the muscles and joints move?

• kinetic energy to potential energy
• heat energy to kinetic energy
• potential energy to chemical energy
• chemical energy to mechanical energy

While on the launch pad, the space shuttle rocket boosters and external fuel tank hold about 3.79x10^6 pounds of fuel. This amount of fuel is necessary to propel the space shuttle into an orbit 300 km above Earth. In order to escape the gravity at the surface of Earth, the chemical energy is converted to which type of energy?

• kinetic
• nuclear
• electrical
• geothermal