SOLIDS: Motion: Particles vibrate in place; particles move slowly Spacing: Close together Attraction: Strong  particles held tightly in place

Two Types of Solids Crystalline: orderly, 3D arrangement in repeating pattern of rows Ex: Iron, diamonds, ice Usually harder solids Amorphous: atoms/molecules arranged in no particular order Ex: rubber, wax Usually softer solids

LIQUIDS: Motion: Particles slide past one another Spacing: Further apart Attraction: Moderate (but particles move fast enough to help overcome some of the attraction between them)

Properties of Liquids Surface tension: molecules at the surface of a liquid are more attracted Viscosity: resistance to flow Higher viscosity  thicker, harder to pour Ex: water vs honey http://www.youtube.com/watch?v=3KU_skfdZVQ Video is 2:41 (no need to watch whole thing if short on time)

GASES: Motion: Particles move quickly and randomly Spacing: Particles very far apart Attraction: Weak attraction between particles No definite SHAPE or VOLUME (both can change)

PLASMAS: No definite shape or volume Made of broken apart atoms (charged particles) Conduct electricity Very hot! Increase heat 1st video is 3:32 2nd video 2:40 Under normal conditions electrons stay attached to the atom. Under extreme conditions (such as super high temps), electrons fall off, which is why plasmas conduct electricity.

PLASMAS: Make up 99 percent of known matter in the universe!!! https://www.youtube.com/watch?v=AVEGJZxglIg https://www.youtube.com/watch?v=a7_8Gc_Llr8 PLASMAS: Make up 99 percent of known matter in the universe!!! Examples: sun, lightning, fire, aurora borealis, fluorescent lights 1st video is 3:32 2nd video 2:40