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Ch. 8 - Solids, Liquids, & Gases

MATTER. Ch. 8 - Solids, Liquids, & Gases. I. States of Matter (p.214-220) Kinetic Molecular Theory Four States of Matter Thermal Expansion. A. Kinetic Molecular Theory. KMT Tiny, constantly moving particles make up all matter.

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Ch. 8 - Solids, Liquids, & Gases

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  1. MATTER Ch. 8 - Solids, Liquids, & Gases I. States of Matter (p.214-220) Kinetic Molecular Theory Four States of Matter Thermal Expansion

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

  3. 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)

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

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

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

  7. 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)

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