Ch 9 - What Matter is Made Of...

Emissions

Any substance that is released into the air

Particles

are a very small piece of matter

States of matter

can be solid, liquid or gas.

Solid

has a definite shape and volume; particles are packed together

Liquid

have a fixed mass, a fixed volume and an definite shape.

Gas

have a fixed mass, abut do not have a definite volume or shape.

matter

is anything that has mass and volume

mass

is the amount of matter in an object

Viscosity

is the flow rate of a liquid

Sublimation

occurs when a solid changes directly into a gas

Chemical change

process by which a substance becomes a new and different substance

The law of conservation of mass

states that matter cannot be created or destroyed but can change from one form to another.

Freezing point (temperature)

the temperature at which a substance changes from a liquid to a solid

Recycling

this involves taking an unwanted object and reusing the material it is made of

Condensation

when a gas turns to a liquid

Freezing

when a liquid turns into a solid state

Evaporation

when a liquid turns to a gas

Compression

when particles are forced close together to make them fit into a smaller space

Boiling point

The temperature at which a substance changes from a liquid to a gas

Melting point (temperature)

The temperature at which a substance melts

The Particle Theory

This theory states that all matter consists of many, very small particles

Melting

When a solid changes to a liquid

Diffusion

the spreading out of particles to fill the space they are in