1. Solids, Liquids, and Gases States of Matter

2. All matter takes up space and has mass There are 4 states of matter Example: Water

3. Solids Every solid has a definite shape and a definite volume. The Kinetic Theory of Matter (p. 215) Crystalline solids Noncrystalline solids

4. Liquids A liquid flows and takes the shape of its container. Liquids can’t normally be squeezed to a smaller volume. Also explained by kinetic theory (p. 216) Example: Ice cream In your notebooks: – Explain how the motion of particles changes when matter changes from one state to another.

5. Gases “springy” Expand or contract to fill the space available to them. Can be squeezed into smaller space. Particles are free to move in all directions until they have spread evenly throughout their container. Example: pumping up a bicycle tire (p. 217) In your notebooks: – Look at figure 8-6 – Read A, B, and C – In a paragraph, explain the difference between gas, liquid, and solid.

6. Plasma The most common state of matter in the universe. Found in stars (the sun) and nebula. (p. 218) A gaslike mixture of positively and negatively charge particles. Thermal Expansion