Transcript Unit Review What is Matter?  Matter is anything that takes up space and has weight.  Matter has three forms.  Matter can.

Unit Review
What is Matter?
 Matter is anything that takes up space and has
weight.
 Matter has three forms.
 Matter can be a solid, a liquid, or a gas.
 Matter is made up of tiny particles called
molecules.
What do we know about solids?
 Solids take up space
and have mass.
 Solids have a shape of
their own.
 Solids can be described
by their physical
properties.
 Solids can be measured.
What do we know about liquids?
 Liquids take up space
and have mass.
 Liquids do not have a
shape of their own.
 Liquids take the shape
of their container.
 Liquids can be
measured (mass and
volume).
What do we know about gases?
 A gas takes up space and has
mass.
 A gas takes the shape of its
container.
 A gas is the only kind of
matter that always fills all
the space inside a container.
 The mass of a gas can be
measured.
Physical Changes in Matter
 Cutting
 Melting
 Mixing
 Freezing
 Shaping
 Changing from one state
of matter to another.
 Evaporating
Other changes in matter
 Some changes in
matter are reversible.
 Some changes in
matter are
irreversible.
 Rusting, burning, and
cooking are
irreversible changes.
Wonderful Water
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Water can be a solid, a liquid, or a gas.
Water as a solid may be ice or snow.
Water as a liquid may be drinking water.
Water as a gas is water vapor.
Heat changes water from one form to another.
Water in all three states make up the water cycle.