1. Water
Iron
Crude oil
Wood
Plastic
Oxygen
Brick
Air
Copper
Gold
Clay
Aluminium

2. Match the words, definitions and examples
Element
Two or more atoms chemically
joined together
Molecule
Two or more different atoms
chemically joined together
Compound
A substance made from only
one type of atom
Mixture
Different elements, molecules
or compounds not chemically
joined together

3. N
a
Carbon
dioxide
salt
Contains
only 1 type
of atom
Has a
symbol
2 or more
elements
chemically
combined
Component
s not
combined
together
Iron and
sulphur
in test
tube
Can be
easily
separated
CuSO Has a
formula
4
e
O2
Cannot be
broken
down
Air
H Cl
iron
Magnesiu
m chloride
Sea
wate
r