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प्रश्न
List five activities that are possible due to the presence of air.
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उत्तर
- Respiration
- Photosynthesis
- Burning
- Movement of sailing yachts, gliders, parachutes, airplanes
- Generation of electricity by windmills
संबंधित प्रश्न
Fill in the blank:
_____________ discovered the oxygen gas.
Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?
Name two air pollutants which cause acid rain.
Tick (√) the correct alternative from the choice given for the following statement.
Photosynthesis is a process in which plants
Tick (√) the correct alternative from the choice given for the following statement.
The substance which accelerates the speed of a reaction without itself undergoing any change is called
Give a brief account of the discovery of air and the scientists involved.
Describe a simple experiment with the help of a diagram to show that Air has mass
State the meaning of the term Air
Fill in the blank:
A candle burns in a jar of oxygen, but gets extinguished in ______
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
