Question

2. Which quantity describes the amount of water vapour in the air?
1. Is the air a compound or a mixture ?
3. What is the major source of carbon dioxide in the air ?
4. What is the relative proportions of nitrogen and oxygen in the air?
oral Questions
All Around Us​

Answer 1

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It provides gases that are essential to life. It has evolved over time and human activity is having an impact on the atmosphere. The air is a mixture of gases. The amount of water vapour in the air varies from place to place, and day to day. For this reason, the proportions of the gases in the air are usually given for dry air.