Advertisements
Advertisements
प्रश्न
Mention five causes of air pollution.
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.
APPEARS IN
संबंधित प्रश्न
What is wind?
Give two uses of the following component present in air:
oxygen
Name two air pollutants which cause acid rain.
Tick (√) the correct alternative from the choice given for the following statement.
Air consists of
Describe a simple experiment with the help of a diagram to show that Air exerts pressure
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
What is global warming?
Cool and soothing wind: Breeze.
uproot trees wind: ______.
In a number of musical instruments, air plays an important role. Can you name some such instruments?
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.
