particles theory
what is matter made of?
matter is made of particles
what are the properties of solids?
a definite shape and volume
what is the change from solid to liquid called?
melting
what is a pure substance?
A pure substance is made of only one kind of particle
what is a mixture?
when two or more things are mixed together but not joined
what are particles always doing?
particles are always moving
what are the properties of liquids?
Define volume but take the shape of their container
what is the change from gas to liquid
condensation
what is an element?
a pure substance that's made of one kind of atom
what is a mechanical mixture?
when you can see the different parts
how are particles of one substance different from another?
each substance is made of its own kind of particle
what are properties of gases?
gases have notifying shape or volume they spread out to fill their containers
what is the change from liquid to gas called?
evaporation
what is a compound?
when two or more elements are joined together
what is a solution
it looks like one thing but its a mix of two or more substances
what happens when a substance is heated?
the particles move faster and spread apart
how are particles arranged in a gas?
particles are far apart and move quickly in all directions
what is the change from liquid to solid?
freezing
what is the difference between an element and a compound?
an element has one kind of atom a compound has two or more
what is the difference between a mechanical mixture and a solution?
in a mechanical mixture you can see the parts in a solution you can't see them
how are particles arranged in a liquid?
they are close together and but can slide past each other
how are particles arranged into solid?
particles are tightly packed together and vibrate in place
What is the change from solids to gas called?
sublimation
how can you tell if something is pure or a mixture?
a pure substance has one thing only a mixture has more than one
how can you separate a mixture?
you can take it apart by sorting,filtering or letting one part dry out