(par 6.3.6) Why is soil important
Why is soil important? 14 Top Soil Uses http://www.rajaha.com/importance-soil-uses-conservation/ Soil is one of the most valuable natural resources available to us. It is very important for sustenance of life on the earth. The top soil which is suitable for plant growth is eroded due to human activities like construction of building, homes, roads and city expansions. On the other hand […]
(par 6.3.5) Importance of air
Importance of air http://www.rajaha.com/importance-of-air/ Essential supplier of energy: All living beings including plants & animals are dependent on air oxygen for generation of valuable life energy. Body cells take up oxygen from blood and generate energy from food in the form of ATP. This biochemical generation of ATP is a basic requirement to sustain life on earth. Air is a conducting medium […]
(par 6.3.5) Air – essential for life
Air – essential for life Air has several meanings A) Greek aeros translated thick vapour, mist B) Greek aenia translated to blow, to breathe C) Greek air is one of the four elements Air is a mixture of: 78.08% nitrogen 20.95% oxygen 0.94% argon 0.039% carbon dioxide 0.00123% neon 0.0005% helium 0.000185% methane 0.000114% krypton 0.000055% […]