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प्रश्न
What is global warming?
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उत्तर
The increased greenhouse effect is caused due to increase in air pollutants and it results in the average increase in temperature of the atmosphere. This is called Global warming.
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संबंधित प्रश्न
Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.
Name two air pollutants which cause global warming.
Fill in the blank
Although we cannot see air, we can ___it.
Tick (√) the correct alternative from the choice given for the following statement.
Air pollution is due to the
Tick (√) the correct alternative from the choice given for the following statement.
The gases which cause acid rain are
State whether the following statement is true or false.
The pressure exerted by air is called atmospheric pressure.
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
Name a device which uses wind energy to generate electricity.
What is wind energy?
Match the items of Column I with the items of Column II
| Column I | Column II | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of air flow |
| (e) | Wind | (v) | Prevent dust particles |
