Question

Why do living things need air?

Answer 1

Air:

1. The invisible gas mixture that envelops the Earth is called air.
2. Most organisms depend on essential elements like oxygen and nitrogen found in air to exist.
3. It is important for living organisms to respire the oxygen for living cells to function .
4. Plants use carbon dioxide (together with sunlight and water) to produce energy and give out oxygen as a by-product which helps living organisms to survive their life.
5. A living object exhales carbon dioxide while respiring, consuming oxygen from the environment that enables both plants and animals to receive the energy they need to feed, develop, and sustain life.
6. Our atmosphere also serves as insulation, preventing the Earth from being too hot or cold.
7. Before reaching Earth, meteoroids that enter our atmosphere scrape against the air and frequently burn into minute fragments.