Physical and Chemical Changes in Matter Study Guide
What are physical properties? What
are examples?
Physical properties are properties that can be observed
using your senses (sight, hearing, smell, taste, touch).
Color, shape, size, texture, function,
density, and state of matter are examples.
What are chemical properties? When
are you able to observe them?
Chemical properties that describe how matter
changes into new types of matter.
You are only able to observe these
during a chemical change.
What happens to matter in a physical
change?
Matter changes physically, but
nothing new is created. It is still the
same type of matter as it started as. For instance, if you break a chocolate bar into pieces, it is still a chocolate bar. If you melt it, it dries(freezes) again into chocolate.
What are some examples of physical
changes?
Tearing paper, slicing tomatoes,
water changing to vapor, etc.
What happens to the particles of
matter when thermal energy is added
to it?
The particles speed up and start
moving faster. Sometimes a phase
change can occur.
What happens to the particles of
matter when thermal energy is taken
away from it?
The particles slow down and move
more slowly. Sometimes a phase
change can occur.
Describe the phase change during:
Condensing: Gas to liquid
Freezing: Liquid to solid
Melting: Solid to liquid
Boiling: Liquid to gas
In which phase of matter are
particles moving fastest?
Particles move fastest in gases. They
move the slowest in solids.
What is a mixture? Give some
examples of mixtures.
A mixture is made up of two or
more types matter that are
combined physically,
1. Air
2. Chex mix
3. Water and sand
What is a solution? Give an
example of a solution.
A solution is a type of mixture in which
substances are dissolved very thoroughly
and will not separate with the force of gravity.
An example of this is sea water.
What are clues, or evidence, that a
chemical reaction has taken place?
Evidence is that
the properties of the new
substance are different than the
original substances, and the change
cannot be reversed very easily.
How is a physical change different
from a chemical change?
In a physical change, the matter
changes form, but nothing new is
created. In a chemical change, new
substances were formed with
different properties.
What happens to the particles of
matter during a chemical change?
In a chemical change, the particles
of matter break apart and form new
types of matter with different
properties.
Give some examples of chemical
changes.
1.Cupcakes baking
2. Fireworks exploding
3. Burning wood