Summative Energy

At which point is the skateboarder's potential energy the greatest?

• W

• X

• Y

• Z

Just before being released at point 1, what is true of the marble?

• Its potential energy is at the maximum, and its kinetic energy is at the minimum.

• Both its potential and kinetic energies are at the minimum.

• Its potential energy is at the minimum, and its kinetic energy is at the maximum.

• Both its potential and kinetic energies are at the maximum.

Which of these illustrates potential energy due to gravity being converted into kinetic energy?

• a kicked football rising into the air

• a crane lifting a heavy steel beam

• a rock falling from a cliff

• a race car speeding around a track

Which type of energy is shown by the wheels turning on the bicycle?

• mechanical energy

• light energy

• sound energy

• heat energy

Abner accidentally left his lava lamp on all night. Which of the following is most likely to happen to the lamp?

• The lava lamp will still be producing light, and it will feel hot to the touch.

• The lava lamp will have lost all of its light, and it will feel cold to the touch.

• The lava lamp will still be producing light, and it will be sending electricity through the glass.

• The lava lamp will have lost all of its light, and it will not be sending electricity through the glass.

Which of the following best describes the law of conservation of energy?

• Energy can be destroyed.

• Energy cannot be created or destroyed.

• Energy can be created.

• Energy can be created and destroyed.

Fireworks light up the night sky and sometimes shake the ground with their explosions. The explosion noises are an example of what type of energy?

• electrical energy

• light energy

• thermal energy

• sound energy

Decreasing the heat of the burner causes the balloon to sink and increasing the heat causes the balloon to rise. How does the heat transfer affect the motion of the air molecules inside of the balloon?

• It causes the cooler air molecules to move faster and rise via conduction.

• It causes the cooler air molecules to move faster and fall via conduction.

• It causes the warmer air molecules to move faster and fall via convection.

• It causes the warmer air molecules to move faster and rise via convection.

Rose touches a hot stove and burns her hand.  What type of energy transfer caused the burn?

• conduction

• convection

• insulation

• radiation

What will happen when substance A is dropped into substance B?

• Substance A will get even warmer as heat flows into it from substance B.

• Substance A will transfer heat to B, and they will eventually reach the same temperature.

• Substance A and B will exchange heat, and they both will reach 25°C.

• Substance A and B will exchange heat, and they both will reach 50°C.