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VARIOUS NOTES: Physical and chemical changes

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


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


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


Give some examples of chemical


1.Cupcakes baking

2. Fireworks exploding

3. Burning wood