Answer:
1.Earth's atmosphere is roughly 78 percent nitrogen on 21 percent oxygen with trace amounts of water, argon,carbon dioxide and other gases
2.Carbon dioxide (CO2) and oxygen (O2) are the most important gases for living organisms. CO2 is vital for use by plants in photosynthesis, in which plants use CO2 and water to convert the Sun's energy into food energy. This food energy is in the form of the sugar glucose (C6H12O6). Plants also produce O2.
3.As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what
4.The Land breeze flows much slower, with top speeds ranging up to 8 knots
