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प्रश्न
Discuss two useful applications of greenhouse effect.
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उत्तर
Two useful applications of greenhouse effect are:
1. Growing vegetables and flowers in snow-bound regions:
Sheds using glass walls are built which allow smaller wavelength of solar heat radiations to pass into the shed but does not allow the longer wavelength of heat radiations to pass out during night. This keeps the shed reasonably warm for flowers and vegetables to grow.
2. Use of glass in keeping homes warm:
In cold countries, the glass windows and doors allow the smaller wavelength of heat radiations of solar energy to pass into the rooms but does not allow longer wavelength of heat radiations to pass out. Thus, greenhouse effect takes place and rooms keep reasonably warm.
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संबंधित प्रश्न
State one method by which :
- Oxygen is added to air
- Carbon dioxide is added to air
- Oxygen is removed from the air
- Carbon dioxide is removed from the air
Name the products formed when a candle burns in air.
Define the Weather.
What is climate?
Why is air called breath of life? Enumerate functions of air or atmosphere.
State its role in warming the earth’s environment and in excess resulting in global warming.
State the utility of –
(a) Water vapour
(b) Rare or inert gases present in the air.
Tick the object which gives out water vapour.
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What is moving air called?
CO2 turns calcium hydroxide solution to a milky white solution.






