Gases Around Us Fact Sheet
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1
2Diffusion
Trees and other
green plants make
their own food.
The air we breathe on
high concentration
low concentration
They produce
planet earth is a mixture
oxygen when they
of gases, 70% of which is
make energy.
nitrogen.
Anaesthetic gas
This cylinder
solid
liquid
gas
contains
Natural gas is
compressed air .
found underground
Methane gas
and is used as a
fuel. Burning fuels
Other fuels
produce carbon
coal
dioxide.
Water vapour is
We can smell the
petrol
odours produced
a gas: it
Helium gas filled balloons
condenses back
by some gases
float because helium is
wood
around us.
into a liquid to form
lighter than air.
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