Intentions for success: We will be successful when we define and describe the states of matter Aug. 29, 2018 Vocab: Kinetic Molecular theory Matter Properties Warm up: What is Matter? List some distinguishing properties that can be used to describe matter. How do we classify matter?

Ch. 8 - Solids, Liquids, & Gases MATTER Ch. 8 - Solids, Liquids, & Gases I. States of Matter (p.68-74) Kinetic Molecular Theory Four States of Matter Thermal Expansion

A. Kinetic Molecular Theory KMT Tiny, constantly moving particles make up all matter. The kinetic energy (motion) of these particles increases as temperature increases. explained

B. Four States of Matter Solids low KE - particles vibrate but can’t move around definite shape & volume crystalline - repeating geometric pattern amorphous - no pattern (e.g. glass, wax)

B. Four States of Matter Liquids higher KE - particles can move around but are still close together indefinite shape definite volume

B. Four States of Matter Gases high KE - particles can separate and move throughout container indefinite shape & volume

B. Four States of Matter Plasma very high KE - particles collide with enough energy to break into charged particles (+/-) gas-like, indefinite shape & volume stars, fluorescent light bulbs, TV tubes

C. Thermal Expansion Most matter expands when heated & contracts when cooled.  Temp causes  KE. Particles collide with more force & spread out. EX: thermostats (bimetallic strip) Complete 1st page handout

Review questions (answer in notes) How are shape and volume used to classify matter? What does the kinetic theory say about atoms? Use the Kinetic theory and attractive forces to explain why a liquid has a definite volume but variable shape