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

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

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

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

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

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

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

A) false
B) true

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) move back and forth rapidly
C) a form of energy produced by vibrating objects
D) the measure of the amount of gravity acting on an object's mass