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प्रश्न
_______ can be seen moving in a beam of sunlight in a dark room.
उत्तर
Dust particles can be seen moving in a beam of sunlight in a dark room.
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संबंधित प्रश्न
Define the term Global warming.
What is air pollution ? What are the harmful effects of sulphur dioxide, nitrogen dioxide and hydrogen sulphide present in the air ?
Give reason:
Aquatic animals and plants are able to survive in the matter.
Compare the three main components of air i.e. nitrogen, oxygen and carbon dioxide with reference to their density and solubility, nature and reactivity.
Why is air considered as a mixture?
What are the components of air?
Analogy
Photosynthesis : _____ :: Respiration : Oxygen
During respiration, carbon-di-oxide is exhaled out of the body through the ______.
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 |
______ is responsible for making clouds.
