Chapter 10 Changing Matter.

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Presentation transcript:

Chapter 10 Changing Matter

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.

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.

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.

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

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