Page 106 - Active Science 5 Ebook and Activity

D. Fill in the blanks.
1. Our environment consists of both _____________ and ______________.
2. Pollution cause harmful effects on our ________________.
3. The harmful substances that make our environment dirty and cause pollution are called
_________.
4. Excessive use of ____________ causes land pollution.
5. _________________ causes soil erosion.
6. _________________ should be constructed far away from the cities.

E. State whether the following statements are true or false.
1. Environment is very important for the survival of all living things. ____
2. Burning of firewood and coal causes air pollution. ____
3. Oil spillage from ships does not cause water pollution. ____
4. The unpleasant sounds which cause discomfort are called noise pollution. ____
5. Deforestation is a cause of water pollution. ____
6. We should use cloth bags instead of polythene bags. ____

F. Short Answer Questions.
1. What is air pollution?
2. Define Global Warming.
3. How is water pollution caused by oil spillage from ships?
4. How does water in villages gets polluted?

5. Explain two reasons of noise pollution.
6. Write harmful effects of noise pollution.
7. What is land pollution? Write one reason that causes land pollution.
8. Write two ways to reduce air pollution.

G. Long Answer Questions.
1. What are the sources of air pollution?
2. Write the harmful effects of air pollution on our environment.
3. Define water pollution. Write the causes of water pollution.
4. What are the causes of land pollution? Write the harmful Effects of land pollution.
6. Write a note on green house effect.

Think Hard

Collect at least three water samples from various areas in your city. Take filter paper and filter
each water sample. Observe which water sample contains more impurity, discuss why.

Project Work

The teacher will divide the class into four groups. Each group will make a poster on a type of
pollution and write down the ways to prevent them. Write slogans to raise awareness. Now each

group will explain its poster in front of the class.

106 Active Science-5