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प्रश्न
Give a reason why water droplets appear on the outer surface of a tumbler containing ice.
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उत्तर
Water vapour present in air, condenses on the cooler surface of the tumbler. Hence they condenses into tiny water droplets.
संबंधित प्रश्न
State three uses of water vapour in the air.
State the utility of oxygen for respiration in plants
Name the following:
An inert gas which has a low boiling point and is used for producing very low temperatures
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
The mesosphere in the atmosphere, contains most of the air, fit for respiration
Air is a mixture of many _______.
Analogy
Photosynthesis : _____ :: Respiration : Oxygen
What is the composition of air?
Match the following:
| 1. | More industrial cities | a. | dust particles |
| 2. | Coastal areas | b. | Humidity |
| 3. | Rainy season | c. | Carbon dioxide |
| 4. | Windy places | d. | water vapour |
Match the following
| 1. | Nitrogen | a. | Acid rain |
| 2. | CO2 | b. | Global warming |
| 3. | Melting of glaciers | c. | Volcanic gases |
| 4. | Corrosion of bridges | d. | Aerated drinks |
State whether the following statement is true or false. If false, correct them.
Plants consume oxygen for respiration.
