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

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

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

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

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

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

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

A) true
B) false

A) a form of energy produced by vibrating objects
B) the amount of matter in an object
C) the substance that does not allow electricity to travel through it
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) move back and forth rapidly
C) the measure of the amount of gravity acting on an object's mass
D) a force that works against motion