A) energy
B) motion
C) light
D) liquid

A) energy changing form
B) vibrating objects
C) thinking about objects
D) changes in the state of matter

A) water
B) empty space
C) matter
D) solid objects

A) gases
B) solids
C) gels
D) liquids

A) empty space
B) a mixture of gases
C) a pool of water
D) a block of iron

A) circular motions
B) empty space
C) waves
D) straight lines

A) feel
B) see
C) hear
D) speak

A) false
B) true

A) the substance that does not allow electricity to travel through it
B) a form of energy produced by vibrating objects
C) a form of energy that travels in waves and can move in empty space
D) the amount of matter in an object

A) move back and forth rapidly
B) a force that works against motion
C) a form of energy produced by vibrating objects
D) the measure of the amount of gravity acting on an object's mass