Energy Unit Review

Which factors affect the amount of kinetic energy of an object?

• height and mass

• height and volume

• speed and mass

• speed and volume

A student takes a rubber band and slowly stretches it between his two fingers. What form of energy does the stretched rubber band contain?

• Elastic kinetic energy

• Elastic potential energy

• Gravitational kinetic energy

• Gravitational potential energy

Examine the two objects. Which statement best describes the potential energy of the objects?

• The battery demonstrates elastic potential energy, and the rubber band demonstrates chemical potential energy.

• The battery demonstrates chemical potential energy, and the rubber band demonstrates elastic potential energy.

• Both objects demonstrate elastic potential energy.

• Both objects demonstrate chemical potential energy.

A student makes a diagram of a cart at three different positions on a hill to demonstrate the transformation of kinetic energy to potential energy as the cart moves through the positions. Assuming no energy is lost to friction, which graph demonstrates the correct energy transformations at the three positions?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

What does the Law of Conservation of Energy state?

• Energy can be created but not destroyed.

• Energy cannot be created but can be destroyed.

• Energy can be created and destroyed.

• Energy cannot be created nor destroyed.

A student obtains two cubes, one large and one small, they are made of steel. The student measures the temperature of the cubes and finds that the large cube is 80°C, and the smaller cube is at 40°C. The student places the smaller cube on top of the larger cube, as shown below. After several minutes, the student notices that both cubes are the same temperature. What does the student demonstrate using the model?

• Convection is the transfer of heat that always happens in an upward direction.

• Conduction is the transfer of heat from a hotter object to a colder object.

• Conduction is the transfer of heat from a larger object to a smaller object.

• Convection is the transfer of heat between objects that are in contact.

The image shows three positions (W, Y, and X) of a pendulum during its motion. If the pendulum swings consistently according to the Law of Conservation of Energy, which statement is true?

• Potential energy will be maximum at positions W and Y and minimum at X.

• Kinetic energy will be maximum at positions W and Y and minimum at X.

• Potential energy will be maximum at positions W and X and minimum at Y.

• Kinetic energy will be maximum at positions W and X and minimum at Y.

What type of energy is produced by fire?

• Chemical

• Heat

• Solar

• Mechanical

What is the main purpose of installing solar panels?

• to capture and convert electrical energy into energy in the form of light waves

• to capture and convert energy from light waves into energy in the form of sound waves

• to capture and convert energy from light waves into energy in the form of electricity

• to capture and convert wind energy into energy in the form of light waves

Which statement is true regarding kinetic and potential energy?

• Both kinetic energy and potential energy rely on motion.

• Both kinetic energy and potential energy are stored energy.

• Potential energy relies on motion, while kinetic energy is stored energy.

• Kinetic energy relies on motion, while potential energy is stored energy.