chapter 2 matter and change - mrs. edwards' science...

1

Matter Matter is composed of tiny particles that are always in constant motion

2

Kinetic Theory of Matter

Describes how the individual particles in

matter move

3

Solids Solids have very little particle movement

(simple vibration back and forth).

Can NOT flow

Solids are also hard to compress.

4

Copper Phases - Solid

5

Liquids

Liquids have moderate particle motion.

The particles of a liquid can easily slide past one another (FLOW)

Liquids are hard to compress because their particles are close together.

6

Copper Phases - Liquid

7

Gases Gases particles are in constant, fast,

random motion.

Gas particles are very far away from each other.

Gases can be compressed.

8

Copper Phases – Vapor (gas)

9

States of Matter

Solid

Liquid

Gas

Definite Volume?

YES

YES

NO

Definite Shape?

YES

NO

NO

Will it Compress?

Small Expansion

Small Expansion

Large Expansion

NO

NO

YES

Result of a Temperature

Increase?

10

Physical vs. Chemical Change

Physical change will change the visible appearance, without changing the composition of the material. – Boil, melt, cut, bend, split, crack

– Can be reversible, or irreversible

– All changes in state of matter are physical changes

11

Phase Changes Melting- Solid Liquid

Freezing- Liquid Solid

Evaporation

Vaporization Liquid Gas

Boiling

Condensation- Gas Liquid

Sublimation- Solid Gas

Deposition- Gas Solid

12

Solid Liquid Gas

Melt Evaporate

Condense Freeze

13

Physical vs. Chemical Change

Chemical change - a change where a new form of matter is formed. – Also called a chemical reaction

– Terms that indicate chemical change include: »Rust, burn, decompose, ferment,

explode, oxidize, corrode, tarnish, rot

14

Chemical Change A change in which one or more substances are converted into different substances.

Heat and light are often evidence of a chemical change.