A) energy
B) light
C) motion
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) matter
D) empty space

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

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

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

A) feel
B) see
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) a form of energy that travels in waves and can move in empty space
D) the amount of matter in an object

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