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

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

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

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

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

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

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

A) false
B) true

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

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