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प्रश्न
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
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उत्तर
We will observe randomly moving dust particles in the beam of light. This confirms the presence of dust particles in the air.
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संबंधित प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Atmospheric nitrogen is directly absorbed by the plants to form plant proteins.
Give two uses of the following component present in air:
water vapour
Fill in the blank
Polluted air is harmful to ____.
Tick (√) the correct alternative from the choice given for the following statement.
Photosynthesis is a process in which plants
State the meaning of the term atmosphere.
Explain Lavoisier’s experiment which provided evidence to the discovery of components in air.
Fill in the blank:
Nitrogen of the air is utilized by plants for formation of _____.
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
In a number of musical instruments, air plays an important role. Can you name some such instruments?
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
