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

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

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

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

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

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

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

A) true
B) false

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

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