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

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

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

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

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

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

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

A) true
B) false

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

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