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प्रश्न
Mention five causes of air pollution.
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उत्तर
CAUSES OF AIR POLLUTION ARE:
- Burning of FOSSIL FUELS and FIBRES.
- Cutting of forests.
- An eruption of volcanoes.
- Increase in POPULATION.
- Agricultural activities like the use of chemical fertilisers, insecticides, pesticides, and burning of husks, etc.
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संबंधित प्रश्न
What was the ancient belief regarding the nature of matter ?
Fill in the blank:
_____________ discovered the oxygen gas.
What is wind?
State two similarities and two differences between respiration and burning.
Describe a simple experiment with the help of a diagram to show that Air occupies space
State the meaning of the term Air
Draw a neat labelled diagram for the following experiment.
To prove that oxygen is non-combustible, but supports combustion.
Cool and soothing wind: Breeze.
uproot trees wind: ______.
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Why did the tiny bubbles appeared?
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Do you think tiny bubbles will appear on heating the water taken out from the bottle? Justify your answer.
