The (a)   energy of an object increases with its height.

• chemical potential
• kinetic
• thermal
• gravitational potential

When water at 10 degrees C is heated to 20 degree C its kinetic energy (a)  

• decreases
• increases
• stays the same
• is unaffected

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 (a)   increases.

• height
• speed
• volume
• 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

• 80 N

• 10 J

• 10 N

As the time required to do a given amount of work decreases, the power developed _____.

• decreases

• increases

• stays the same

• is unaffected

Energy stored in food would be considered (a)  

• chemical potential
• kinetic
• thermal
• gravitational potential

Conduction is the transfer of heat energy by (a)  

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

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

• friction
• television
• flower
• gravity

Green plants convert light energy from the sun into (a)   during photosynthesis.

• gravitational potential energy
• chemical potential energy
• thermal energy
• mechanical energy