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

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

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

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

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

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

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

A) true
B) false

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

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