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

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

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

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

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

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

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

A) false
B) true

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

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