Friday, February 17, 2012

The Effects of Cigarettes Smokes on Your Lungs

The school project to observe the effects of cigarettes smokes on lung is give to students at the age of 15 years in public schools in Malaysia. One of the objective of the ministry is to smoke clean living without tobacco.

To observe the effects of smoking on the lungs.

Apparatus and Materials:
Thermometer, U-tube, cotton wool, rubber tubing, glass, glass tubing, conical flask, filter pumps, cigarettes, litmus paper, rubber stopper, lighter or match.


1. The apparatus to be set up as in the Figure 1

2. The following data are recorded before and after the activities
a. the color and smell of the cotton wool
b. the color of the litmus paper solution
c. the temperature of the u-tube

3. The cigarette was lit.

4. The filter pump was switched on.


Cotton Wool
The white cotton wool turns brown
Cigarette smokes contains tar.
Universal  Indicator
The solution turns from green to yellow
Cigarette smoke contains acidic gases
The temperature rises from 30 to 32 degrees C
Cigarette  smoke  produces heat


1. What does the cotton wool in the u-tube represents?.
It represents the human lungs.

2. What is the function of the litmus paper solution?.
It is an indicator to test the acidity or alkalinity of the smoke.

3. What is the materials in the smoke that cause the cotton wool to change color?.
The materials are the nicotine and tar.

4. What cause the litmus solution to change its color?.
sulphur dioxide, carbon monoxide and hydrogen cyanide.

5. What is the conclusion of the experiment?.
The cigarette smoke contains harmful substances that can cause diseases such as bronchitis, asthma, lung cancer and heart disease.

Youtube Video
I am searching for free video to supplement the above experiement.


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