1. Unit 4 Lesson 4 What Are Mixtures and Solutions? Copyright © Houghton Mifflin Harcourt Publishing Company

2. Unit 4 Lesson 4 What Are Mixtures and Solutions? Florida Benchmarks Copyright © Houghton Mifflin Harcourt Publishing Company SC.5.P.8.2 Investigate and identify materials that will dissolve in water and those that will not and identify the conditions that will speed up or slow down the dissolving process. SC.5.P.8.3 Demonstrate and explain that mixture of solids can be separated based on observable properties of their parts such as particle size, shape, color, and magnetic attraction.

3. Unit 4 Lesson 4 What Are Mixtures and Solutions? Matter Mix-Up Copyright © Houghton Mifflin Harcourt Publishing Company A mixture is a combination of two or more substances that keep their identities. Making a mixture is a physical change.

4. Unit 4 Lesson 4 What Are Mixtures and Solutions? Find a Solution! Copyright © Houghton Mifflin Harcourt Publishing Company A solution is a mixture that has the same composition throughout. A solution forms when one substance dissolves in another.

5. Unit 4 Lesson 4 What Are Mixtures and Solutions? Find a Solution! Copyright © Houghton Mifflin Harcourt Publishing Company When a substance dissolves, it breaks into tiny particles. Those particles mix with the other particles in the solution. Not all substances can dissolve. For example, salt dissolves in water, but sand does not.

6. Unit 4 Lesson 4 What Are Mixtures and Solutions? Find a Solution! Copyright © Houghton Mifflin Harcourt Publishing Company Many solutions are liquids. Some solutions, such as air and brass, are gases or solids.

7. Unit 4 Lesson 4 What Are Mixtures and Solutions? Separating Mixtures Copyright © Houghton Mifflin Harcourt Publishing Company A mixture can be separated. Physical properties such as color, size, melting point, boiling point, density, and ability to dissolve can be used to separate mixtures. Mixtures can be easy or difficult to separate.

8. Unit 4 Lesson 4 What Are Mixtures and Solutions? When One Isn’t Enough Copyright © Houghton Mifflin Harcourt Publishing Company A sieve, or mesh screen, can be used to separate matter by particle size. A magnet can be used for separating items containing iron.

9. Unit 4 Lesson 4 What Are Mixtures and Solutions? When One Isn’t Enough Copyright © Houghton Mifflin Harcourt Publishing Company Filters can separate mixtures by allowing only the smallest bits of matter to pass through. Boiling and evaporation can separate mixtures as the liquid particles leave a solution. Dissolved particles stay behind.

10. Unit 4 Lesson 4 What Are Mixtures and Solutions? Recycling Mixtures Copyright © Houghton Mifflin Harcourt Publishing Company Items returned for recycling need to be separated. Physical properties of recyclable items are used to separate them into bins. Metal, plastic, paper, and glass can all be recycled and turned into new products.