Examining Mixtures & Solutions

Examining Mixtures & Solutions — page 1 — 4 1 A Chapter WHAT ARE MIXTURES & SOLUTIONS A mixture is a combination of two or more substances We encounter mixtures every day They can be made of solids gases or liquids Pouring milk into cereal makes a milk and cereal mixture Salad is a mixture of different ingredients Even air is a mixture of different gases A solution is a type of mixture In a solution one substance is dissolved in another Stirring salt into water for example makes a saltwater solution In some mixtures you can easily see the different parts But you can't see all the parts in a solution A saltwater solution looks like regular water You can't see the salt that is dissolved in it

Examining Mixtures & Solutions — page 2 — The water in the ocean is a saltwater solution

Examining Mixtures & Solutions — page 3 — 6 Chapter 2 HETEROGENEOUS OR HOMOGENEOUS Mixtures are either heterogeneous or homogeneous Homogeneous mixtures are the same throughout Mixing sugar in water creates a homogeneous mixture The dissolved sugar spreads out evenly through the water If you sampled different parts of the mixture they would all contain the same amount of sugar A heterogeneous mixture is not the same throughout Different parts of the mixture have different substances A chocolate chip cookie is a heterogeneous mixture If you took samples of the cookie the samples would be different from each other Some samples would have chocolate chips Others wouldn't

Examining Mixtures & Solutions — page 4 — One method scientists use to tell whether a mixture is homogeneous is viewing it with a microscope

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