Physical States of MatterPhysical States of Matter

Ms. Wells, Science

States of MatterStates of Matter

• Different forms of matter:

• Solid

• Liquid

• Gas

• State depends on 2 things:

• Particle (atoms/molecules) arrangement

• Particle motion

Solid MatterSolid Matter

• Fixed volume, Fixed shape

• Particles packed together tightly – usually in a repeating pattern

• Examples: wood, glass, salt, plastic

Solid MatterSolid Matter

• Particles vibrate in place

• remember – matter is always in motion!• Want to separate the particles in a solid?

BREAK it!

Liquid MatterLiquid Matter

• Fixed volume, changing shape

• Particles can move from place to place

• Particles attracted to each other, but more easily separate

• Take the shape of the container its put in

• Examples: milk, oil, honey, water

Gas MatterGas Matter

• Volume changes, shape changes

• Examples: air, oxygen, water vapor

• Particles always push outward on container• Spread to fill container if

there is more space• Or pack closer together

when there is less space = PRESSURE from the pushing!

Pressure: Gases and TemperaturePressure: Gases and Temperature

• Increased temperature (add heat)• Particles speed up(more energy)

= Volume increases!• Decreased temperature • (remove heat)

• Particles slow down (less energy)

= Volume decreases!

…More about this in Chapter 2!

The End!The End!

Matter matters because it is (almost) everything.