Science: Unit 1 Review
The 3 states of matter are
solids, liquids,
and gases.
Matter is anything that has mass and
takes up space.
Chemistry can often
imitate or copy matter found in nature using artificial
chemicals producing man-made flavors, scents
and even colors.
All matter is made up of
tiny, microscopic particles. They have empty spaces
between them and are moving randomly
all the time. They move faster and spread father apart when they are heated. They are also attracted
to each other and stay together
instead of flying apart.
A solid
has a definite shape and a definite volume.
A liquid
has a definite volume and takes the shape of its container.
A gas
does not have a definite volume or shape; it expands to fill the shape
and volume of its container.
As liquid water is heated,
the water particles move farther apart
causing the water to change to water vapour or steam.
A pure
substance is made up of only 1 type of substance. 3 examples include salt,
sugar, baking
soda.
A mixture
is matter that is made up of 2 or more pure substances. 3 examples include milk,
water, fat.
2 examples of hazardous or
dangerous pure substances that should never be discarded into regular garbage
include mercury, uranium.
A mechanical
or heterogenous mixture is one where you can see the different parts of
the mixture because the particles weren’t evenly mixed such as garden soils or omelettes.
A solution
or homogenous mixture is one that looks like 1 pure substance but is really
made up of different particles that were evenly mixed such as shampoo or stainless steel.
