Types of Matter

Mixtures vs. Substances

Pure Substances

Matter that has a uniform and unchanging composition is a substance.

A substance is made of the same things in the same proportions every time.

All samples match: Water Lead Salt

Two types of substance

Elements Made of only one type

of atom Cannot be broken

down (physically or chemically) into simpler substances

Used to make all other matter

All listed on the periodic table

Compounds A combination of two

or more different elements that are combined chemically

The compound has different properties than the elements that make it up

Can be separated, but only by chemical reactions

Element or Compound

Gold

Water

Salt

Lead

Sugar

Element

Compound

Compound

Element

Compound

Mixtures

Mixtures are combinations of two or more pure substances that can be physically separated.

Mixtures vary in composition: Not everyone has the same chicken soup

recipe…

Two types of mixture

Heterogeneous These are not blended

smoothly throughout Two samples of the

mixture don’t match

Ex: Raisin Bran River water Pulpy orange juice

Homogeneous These have a constant

composition throughout.

Always a single phase (i.e. two liquids mixed)

Often called solutions

Ex: Salt water Air Steel (Iron and

carbon)

Heterogeneous or Homogeneous?

Gasoline (87 octane)

Pizza

Cereal with milk

Blueberry muffin

Homogeneous

Heterogeneous

Heterogeneous

Heterogeneous

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Matter

Fill out the “matter web”

Start with “Matter” in the top box.

What are the two types of matter that we talked about today?

Each type of matter has two categories. What are they?

Assignment

Adding on to 1-9… Page 69; 15-19