1. States of Matter Notes By Scott Roskelley

2. Solids Molecules are close together The molecules are moving slowly

3. Definite Size and Shape

4. Molecules attracted to each other

5. Crystalline Solids The atoms are arranged in a set pattern

6. Amorphous Solids The atoms are arranged in a random pattern

7. Liquids Molecules are farther apart than solids The molecules are moving faster than in the solid state There is less attraction

8. Liquids (continued) Liquids have no definite shape They take the shape of their container They keep their volume

9. Viscosity Measure of how a fluids resists a change in its shape Caused by friction within the molecules Higher viscosity means it is thicker and more sticky

10. Surface Tension Property of a liquid that allows it to act as a sheet on the surface Caused by the attraction of the molecules in the liquid Also caused by the compression of the liquid in its container

11. Gases The molecules are even farther apart They are moving faster Moving fast enough to overcome attractions between particles

12. More about gases They are able to change both shape and volume They expand to fill an area with the molecule equal distances apart The pressure of the gas can depend on volume and temperature

13. Boyle’s Law As you increase volume, you decrease pressure OR As you increase pressure, you decrease volume, or compress the gas

14. Charles’s Law As you increase temperature, you increase volume OR As you decrease temperature, you decrease volume

15. Plasma Acts like a gas but can conduct electricity 99% of the universe No definite shape or volume Ionized gas – often hot

16. Plasma Examples Plasma Displays (e.g. T.V) Fluorescent Lights Northern Lights Neon Lights Lightning The Sun

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