In this post I will show you how to make your own cloud in a bottle and at the same time learn how they
are formed.
First you will need:
STEP FIVE
First you will need:
·
A Clear Two Litre Bottle
·
A Match
·
Water
Right now for the FUN…
STEP ONE
Take the
bottle and put 2cm of water in the bottom.
STEP TWO
With the lid off the bottle, light a match let it
burn for a second and then blow it out and drop it into the bottle. You can also try dropping the match straight
into the bottle as the water and the lack of oxygen will put out the flame.
REMEMBER:
BE CAREFUL NOT TO BURN YOUR FINGERS.
CHILDREN SHOULD HAVE A RESPONSIBLE ADULT SUPERVISING AT THIS POINT.
STEP
THREE
Tighten the cap of the bottle tightly and as
quickly as you can after dropping in the match.
STEP FOUR
Squeeze the bottle REALLY HARD for about 5-10
seconds while, at the same time, giving it a swirl.
STEP FIVE
Stop squeezing the bottle and let it go allowing it
to expand. What do you see?
You
should be able to see a cloud in the bottle.
If you squeeze the bottle again it will disappear and then when you let
it go your cloud will reappear. MAGIC!
What is
happening?
In short what is happening is smoke particles are
floating around above the water. When
you squeeze the bottle the temperature in the bottle increases, this makes some
of the water evaporate. When we let go
of the bottle the water condenses small water drops condense on to the smoke
particles and this is what forms the cloud.
Why do we
use the match?
It’s because water molecules find it hard to
condense in clean air, they need something to cling on to so in this experiment
we gave it smoke!
Real clouds do the same sort of thing however they
cling to things like: dust, pollen and pollution. Fog works in the same way too.
Did you know that an average cloud is made up of
billions of water droplets?
A storm cloud can weigh as much as 24 millon Rhinoceros’
(that’s what Chiara read out to me in her national geographic magazine the
other day!)
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