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

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) gases
B) gels
C) liquids
D) solids

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

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

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

A) true
B) false

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

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