1. Chapter 10
Changing Matter

2. Physical Changes Lesson 2
Vocabulary
Physical Change: a change in the way matter looks. Tearing a sheet of paper is a physical change.
Mixture: different kinds of matter mixed together. When you pour milk in cereal you have a mixture.
Solution: forms when one or more kinds of matter are mixed evenly into another kind of matter.

3. What are physical changes?
A physical change is a change in the way matter looks.
Tearing a sheet of paper is a physical change.
The size and shape of the paper is different, but the paper is still paper.
A change of state is also a physical change. When liquid freezes, its state changes but it is still water.

4. When happens when you mix matter?
Another kind of physical change is a mixture.
A mixture is different kinds of matter mixed together.
When you pour milk on your cereal, you are making a mixture.
In a mixture the properties of each kind of matter might change. The cereal
may get soggy.
A mixture can be a combination
of solids, liquids, and gases.

5. Solutions One kind of mixture is a solution.
A solution forms when one or more kinds of matter are mixed evenly into another kind of matter.
Salt water is a solution. If you add salt to water, the salt mixes evenly with the water.
Some solutions contain no liquids at all. Air is a solution of different gases

6. How can mixtures be separated?
Some properties help you separate mixtures.
These properties include size, shape, and color.
One way to separate a mixture is to pick out each different type of matter.
Another way is by evaporation. Leave a solution of salt and water in a warm place. As the water evaporates, the salt is left behind.
Filters separate mixtures by size
Magnets separate certain metals from other objects