There are three states of matter: solid, liquid, and gas. The key difference between these states is how the particles move - in solids they vibrate in place, in liquids they move freely past one another, and in gases they are far apart and moving very fast. Substances can change between these states through melting, boiling, condensing, or freezing. Physical changes alter the state of a substance without changing its chemical makeup - for example, water can change between solid, liquid, and gas states through physical changes. Mixtures are combinations of two or more substances that do not undergo chemical changes and can be separated back out.

1. What are Physical Changes in Matter? Lesson #2

2. States of Matter Three States of Matter -solid -liquid -gas -Every substance on Earth can exist as a solid, as a liquid, or as a gas. -The difference between them is in the way the particles move. Example: Water

3. Solid Particles are close together (do not move) and just vibrate in place.

4. Liquid Particles that are close to each other, but also they move quickly and slide past each other easily.

5. Gas Particles are far apart and moving really fast.

6. 4 Ways Substances Can Change State change of state -occurs when a substance changes from one another. Each change of state has its own name. solid to a liquid liquid to a gas gas to a liquid liquid to a solid -melting -boiling -condensing -freezing

7. Physical Changes physical change- is a change that does not result in a new substance. Examples of Physical Changes -cut, rip, fold, crumple, shred, carve, etc… (also changes in state- melting, freezing, boiling, and condensing) In a physical change, no new substance is formed. Example- If you shred paper. What is left? (paper) What you started with is what you ended with!

8. Mixtures In science, mixtures have a specific definition which is two or more substances that combine without changing any of them . Example: salad, vegetable soup, soil, lemonade, chocolate milk, etc… -Not all mixtures are made of solids, but most materials are found in nature. -Remember being in a mixture DOES NOT change the substance and mixtures can be separated back out.