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

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

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

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

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

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

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

A) false
B) true

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

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