Advertisements
Advertisements
प्रश्न
What is meant by ozone depletion?
Advertisements
उत्तर
- Ozone is present in the upper layer of the atmosphere called the stratosphere. It protects the earth from harmful ultraviolet rays of the sun.
- Some air pollutants, like chlorofluorocarbon (CFC), react with ozone present in the atmosphere. These pollutants reduce the density of the air.
- The ultra-violet rays from the sun reach directly on the earth, which affects human health, causing skin diseases and cancer and also increase the earth’s temperature.
APPEARS IN
संबंधित प्रश्न
Fill in the blank:
_____________ discovered the oxygen gas.
What do you observe when a burning candle is covered with an inverted jar.
How is air useful to agriculture?
Fill in the blank
Air is a ______ of gases
Name the following.
Inert gases in the air
Answer in your own words.
What are the various constituents of air? Write their uses.
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
Draw a neat labelled diagram for the following experiment.
To prepare oxygen in the laboratory from hydrogen peroxide and a catalyst.
Which of the following statements is incorrect?
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
The ______ makes the windmill rotate.
