Experiment
Here is proof that smoking really is bad for you. We decided to do an experiment
with two vacuum filters, an ashtray, a cigarette and a metal can. We put the
cigarette in the ashtray and put the can on top, over that we put 1 of the vacuum
filters. Then we lit the cigarette and left it burn in the ashtray for 15 minutes.
We wanted to see how long a cigarette could burn on it's own and if the filter
would change colour. 
Hypothesis:
We think that the fi
lter
on top of the cigarette will turn brown and that the cigarette will burn for the
whole 15 minutes!
Conclusion:
The filter did change colour, it was a light yellow. But that was only 15 minutes,
so imagine what colour your lungs would be in a year after smoking 3 packs of
cigarettes every day! This experiment proves what cigarettes do to your lungs
