Matter and Mixtures

1
Matter and Mixtures

• Unit 3

2
Matter

• What is matter?
• Matter is anything that has mass and takes up
  space.
• Examples of matter
• Air
• Textbook
• TV
• What is not matter?
• Forces (gravity, magnetism, buoyancy, etc.)
• Energies (sound, light, electricity, etc.)

3
Chemicals

• What is a chemical?
• As a class, discuss the meaning of a chemical.
• When you think of chemicals, we often only think
  of dangerous substances. These are chemicals,
  but actually we come in contact with chemicals
  everyday!
• All matter is made up of chemicals!!

4
Chemicals

• Chemicals can be classified under two types
• Natural Chemicals
• Manufactured Chemicals
• Natural Chemicals
• These chemicals occur naturally on Earth.
• For example, years ago, people used to go to
  river beds panning for gold. This gold formed
  naturally.
• Manufactured Chemicals
• These chemicals are man-made.
• Today, we mix natural gold with other chemicals
  to make jewelry. This jewelry is considered
  manufactured.

5
Natural Chemicals

• Which natural chemical do you think is the most
  important on Earth?
• Water!!
• List as many uses of water that you can think of
  in 30 seconds. Start now!
• With so many uses of water, it is important to
  keep it from getting contaminated (polluted).
• How do we pollute our water?
• How could we prevent this pollution?

6
Mixtures

• What are mixtures?
• Mixtures are formed when two or more substances
  combine.
• List as many different mixtures as you can in 30
  seconds.
• GO!

7
Mixtures

• What do these mixtures have in common?
• Salt water
• Kool-Aid
• Brass
• How are these mixtures different from the ones
  given below?
• Pepper and water
• Orange juice with pulp
• Chocolate chip cookies

8
3 Types of Mixtures

• Although your text only discusses two types of
  mixtures, there are actually three.
• In the following website, these three types of
  mixtures are discussed and an activity follows.
• http//www.coolschool.ca/lor/SC7/unit6/U06L03.htm
• In your notebooks, write the definitions of the
  three types of mixtures. Give an example of
  each.
• Complete the Cool School worksheet on mixtures.

9
Mixtures

• Your textbook describes two types of mixtures
• Heterogeneous mixtures
• A combination of two or more different types of
  matter that retain their own properties and that
  can be detected quite easily.
• Does this sound familiar?
• A heterogeneous mixture is the scientific term
  for a mechanical mixture.

10
Mixtures

• Homogeneous mixtures
• A combination of two or more different types of
  matter that appear to be the same throughout the
  mixture and have the same properties.
• Does this sound familiar?
• A homogeneous mixture is the scientific term for
  a solution.