1. Everything is made of atoms One molecule is the smallest
Substances are made of atoms particle in a substance.
There are 113 types of atoms If you destroy the particle you don't
Atoms join together in groups called have the substance any more.
molecules
Atoms: C, O, H, N, Ca, Na, K, Cl... Different types of molecules
PURE SUBSTANCES MIXTURES OF SUBSTANCES
Only one type of molecule, only With several kinds of molecules or
one type of particle. particles.
You can separate each type of
particles easily. You can join them
again and the initial mixture will
appear. (chomatography of ink...)
ELEMENTS COMPOUNDS HOMOGENEOUS HETEROGENEOUS
No way you can With chemical MIXTURES OR MIXTURES
separate it. experiments you DISOLUTIONS Different
Because there is can separate a Molecules of two components can
only one TYPE of compound into or more types be seen to the
atoms, you can several are mixed up. naked eye or with
not turn it into substances. This microscopes.
several proves there are
substances. several types of Examples:
atoms in the blood: red cells+
particle. white cells+ plasma;
oil and water;
sand and sugar.
You can not
Ozone O3
distinguish the
Elaine - Lesson 1 pag1

2. But if you destroy different parts.
the particle you
don't have the
initial substance,
you have other
substances
-electrolysis of water-
Task 1: Pure substance or mixture of substances? Element or compound? Explain your decision
Elaine - Lesson 1 pag2

3. Task 2
Here are two different atoms:
Use them to draw a: a)Compound b)Mixture
Task 3 Identify: compound, mixture and element
1) 2) 3) 4)
5) 6) 7)
Drawing/s number is/are elements because...
Drawing/s number is/are compounds because...
Drawing/s number is/are mixtures because...
Draw how you think particles in the air are organised. Represent particles with dots
Task 4 Put the following information in the correct place in the facts file.
Can be chemical compounds or elements/ only one component / a subgroup of mixtures/ made up of a
solvent and a solute/ cannot be broken down/ often but not always liquid / homogeneous ones are called
solutions/ have a fixed composition / contain two or more elements/ classified in the Periodic Table / made
up of more than one substance / unique differentiating properties/ about ninety are found in nature / made
up of more than one substance / can be homogeneous or heterogeneous
Elaine - Lesson 1 pag3

4. FACTS FILE: MATTER
Pure substances
Compounds
Elements
Mixtures
Solutions
Task 5
Explain how you would separate the following mixtures:
1. Salt from sea water
2.- The different colour inks in black ink.
2.Alcohol from water (hint: alcohol has a boiling point of 58ºC)
Task 6
You work for a mining company that mines a mixture of iron filings, large lumps of tin, sand and salt.
Design a machine that could separate this mixture.
Task 7. Classify: milk, fresh water, sea water, distilled water, orange juice, cell, meat
Elements:
Compounds:
Mixtures:
Elaine - Lesson 1 pag4

5. Teacher's key
Elaine - Lesson 1 pag5

6. Elaine - Lesson 1 pag6