Unit 1 Lesson 5

Question 1

Solid

Answer 1

Has a definite shape and volume
The particles are close together and do not move freely (fixed in place)
The particles vibrate but cannot move

Question 2

Liquid

Answer 2

Has a definite volume but not a definite shape. (Takes the shape of the container)
The particles are not fixed and can move and slide past one another
The particles have more kinetic energy than particles in a solid

Question 3

Gas

Answer 3

Does not have a definite volume or shape
Particles have the most kinetic energy of the 3 states of matter
Particles are far apart and can move easily. The amount of space between the particles changes

Question 4

What Happens When Substances Change State?

Answer 4

The motion of the molecules and the amount of space between the molecules changes

Example: When a substance is heated, the kinetic energy increases and the space between molecules increases
When as substance is cooled, the kinetic energy decreases and the space between molecules decreases

Question 5

What Happens When Substances Lose or Gain energy?

Answer 5

Its temperature can change
Or
Its state can change

Question 6

Melting
Freezing
Boiling
Evaporation

Answer 6

A Solid becomes a liquid

A liquid becomes a solid

A liquid becomes a gas ( throughout)

A liquid becomes a gas ( at the surface of the liquid)

Question 7

Condensation
Sublimation
Deposition

Answer 7

A gas becomes a liquid

A solid becomes a gas

A gas becomes a solid

Question 8

The Kinetic Theory of Matter

Answer 8

All matter is made of atoms and groups of atoms that are in constant motion.
How much the particles move and how often they bump into each other determines the state of matter of the substance