Energy Unit Assessment

The ____ energy of an object increases with its height.

• chemical potential
• kinetic
• thermal
• gravitational potential

An object that has kinetic energy must be _____.

• lifted above Earth’s surface.
• in motion.
• at rest.
• changing direction.

The law of ____ states that energy in a system can change forms but can never be created or destroyed.

• conservation of energy
• consecration of energy
• conversion of energy
• construction of energy

The kinetic energy of an object increases as its ______ increases.

• height
• speed
• volume potential energy
• potential energy

How much force is required to lift a rock a vertical distance of 8 m if 80 J of work were done?

• 80 J
• 10 J
• 80 N
• 10 N

When a ball is dropped it bounces until it eventually stops. Why does this happen?

• Some of the ball’s energy is lost.
• Some of the ball’s energy is converted to other forms, such as thermal and sound.
• All of the ball’s energy is eventually converted to potential energy when the ball stops bouncing.
• All of the ball’s energy is eventually converted to kinetic energy when the ball stops bouncing.

The diagram to the right shows four locations in a temperature field. The temperature of each location is given in degrees Celsius. Heat energy will

• D to A
• C to B
• B to D
• B to C

Energy stored in food would be considered

• chemical potential
• kinetic
• thermal
• gravitational potential

Conduction is the transfer of heat energy by______

• direct particle contact
• electromagnetic waves
• density differences
• movement through a vacuum

An example of an energy conversion from kinetic to thermal energy would be

• friction
• television
• flower
• gravity