Advertisements
Advertisements
प्रश्न
What is meant by the term ‘atmosphere’? State the role played by the atmosphere for the survival of mankind.
Advertisements
उत्तर
A blanket of air around earth is called the atmosphere. Without an atmosphere, life would not be possible, as the atmosphere protects us from harmful gases. We could not live without the air present in the atmosphere. In the absence of the atmosphere, the earth would get so cold at night that we would not be able to survive. No \[\ce{CO2}\] and \[\ce{N2}\] for plants without atmosphere.
संबंधित प्रश्न
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
How is air useful to scooters and cars.?
What is air pollution?
State four steps to be taken to control air pollution.
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
Water does not have a ______ but has definite ______ and ______.
Explain Lavoisier’s experiment which provided evidence to the discovery of components in air.
Draw a neat labelled diagram for the following experiment.
To determine the component of air used up in burning, by using phosphorus and a bell jar.
Complete the statement given below by filling in the blank with the correct word/s from the word/s given below
____________ is an example of a pollutant present in the air.
The layer of air around the earth is known as ______.
