States of matter Kinetic Theory All matter is

States of matter

Kinetic Theory • All matter is made up of tiny particles that are constantly moving

Solids • Have definite shape and definite volume • Particles are closely packed, vibrate in place, & held together by strong force of attraction

2 Types of solids 1. Crystalline solids: particles arranged in a regular repeating 3 D pattern Ex: salt, ice, diamonds

• 2. Amorphous solids: particles lack a regular repeating arrangement – Will flow slowly over time • Ex: Glass, Wax

Liquids • Have definite volume, not definite shape – Force of attraction not strong enough to hold a definite shape • Particles close together but move more than solids • Liquids flow and take shape of container

Liquids flow to take shape of their container

Gases • Have no definite shape and no definite volume • Particles move quickly and collide often • Particles very far apart • Force of attraction between particles is very weak • Gases expand will fill entire container

3 States of Matter

Plasma • 4 th state of matter (similar to gas) • No definite volume or shape • Most common form of matter in universe – Found in sun and stars • Particles collide violently at high temperatures – Collisions cause particles to become electrically charged

Changing States of Matter • Adding energy causes particles to move faster and further apart – Particles overcome forces of attraction allowing matter to change states (solid-liquid-gas)