2. States of Matter Physical and Chemical Changes Classifying Matter

3. Chemistry is the study of matter.

4. Matter is anything that has mass and volume.

5. Solids Liquids Gases

7. Have a definite shape Have a definite volume Atoms close together and moving very slowly

8. Have an indefinite shape Have a definite volume Atoms not as close and moving quicker

9. Have an indefinite shape Have an indefinite volume Atoms spread apart and moving quickly

10. At 100°C, water becomes water vapor, a gas. Molecules can move randomly over large distances. Below 0°C, water solidifies to become ice. In the solid state, water molecules are held together in a rigid structure. Between 0°C and 100 °C, water is a liquid. In the liquid state, water molecules are close together, but can move about freely.

11. All matter can exist in all three phases depending on the TEMPERATURE.

12. To absorb heat means to add heat!

13. To release heat means to cool or lose heat.

14. The change of a solid to liquid is called… MELTING

15. The change of a liquid to a gas is called… BOILING OR VAPORIZATION

16. The change of a solid to a gas is called… SUBLIMATION

17. The change of a gas to a liquid is called… CONDENSATION

18. The change of a liquid to a solid is called… FREEZING