Energy Review

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
• consecrations of energy
• conversion of energy 
• construction of energy

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

• height
• speed
• volume
• potential

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

• 80 J
• 80 N
• 10 J
• 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

Heat energy flows from

• high heat to low heat 
• low heat to high heat

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