1. Substances and Mixtures
Preview with Foldable

2. Important Words to Know
Mixture –
Is made of 2 or more substances.
It is elements, compounds, or both that are together in the same place but are not chemically combined.
Each substance in a mixture keeps its individual properties.

3. Two Types of Mixtures
Heterogeneous – In this type of mixture you can see the different parts.
Homogeneous – In this type of mixture the parts are evenly
mixed and you can not see the different parts.

4. Important Words to Know
Solution -
This is an example of a homogeneous mixture.
Example – Stirring sugar into water, the sugar dissolves and you can no longer see it but you know it is there because you can taste it.

5. Important Words to Know
Colloid -
This is a mixture that contains small, undissolved particles that do not settle out.
It contains larger particles than a solution.
The particles are still too small to be seen easily but are large enough to scatter a beam of light.
Example – Fog – this is colloid that consists of water droplets in the air causing headlights on a car to scatter their beams making it difficult to see.

6. Head lights in fog.

8. Important Words to Know
Emulsion -
A mixture of two or more liquids that are normally unmixable or unblendable. 
They are a colloid.
Example – Oil and Water

9. Examples
Mixture – mixtures of sand and water or sand and iron filings, a conglomerate rock, water and oil, a portion salad, trail mix, and concrete (not cement).
Substance – A single kind of matter that is pure, and has a specific set of properties. Table salt is an example as it has the same properties no matter where it comes from – an underground mine or the sea.

10. Breaking down mixtures and substances video