Match the following: Column A Column B 1. Nitrogen Air pollution 2. Balloon Smoke and fog 3. Smog 78% 4. Lung cancer Air

The percentage of nitrogen in air is 78%. Nitrogen is necessary for growth of the plants. Balloon is inflated with air. The air that we breathe is a mixture of gases, many tiny solid and liquid particles. Smog is a type of air pollution which is a mixture of smoke and fog. It affects our respiratory organs and cause heart problem. Air pollution can cause lung cancer. It affects our respiratory organs and nervous system. Column A Column B 1. Nitrogen 78% 2. Balloon Air 3. Smog Smoke and fog 4. Lung cancer Air pollution

E M B I B E

Standard 4 Term III Science>Chapter 3 - Air We Breathe>Evaluation

Tamil Nadu Board Solutions for Chapter: Air We Breathe, Exercise 7: Evaluation

Author:Tamil Nadu Board

Tamil Nadu Board Science Solutions for Exercise - Tamil Nadu Board Solutions for Chapter: Air We Breathe, Exercise 7: Evaluation

Attempt the practice questions on Chapter 3: Air We Breathe, Exercise 7: Evaluation with hints and solutions to strengthen your understanding. Standard 4 Term III Science solutions are prepared by Experienced Embibe Experts.