Effects of Smoking

We test the effects of smoking by drawing first air and then cigarette smoke through apparatus that contains mineral wool and universal indicator. The air has no effect, but the smoke discolours the wool and changes the colour of the indicator. This shows that there are acidic chemicals in the smoke.

Biology - Human Body - Learning Points.
Inhaling chemicals from tobacco smoke can damage the respiratory system.
Tobacco smoke contains tar, which can collect in the lungs.
Tobacco smoke is acidic and can irritate and damage the lungs.
Tobacco smoke contains nicotine, which is addictive.
Steps have been taken to discourage smoking, such as restrictions on advertising and banning smoking in public places.

A Twig Experiment Film.
Let students experience real experiments in lab conditions anywhere, from setup, method all the way through to analysis and real-world application.