Question

Oxygen cycle - Explain the cycle in your own words with suitable diagrams.

Answer 1

The oxygen cycle is the biogeochemical cycle of oxygen within its four main reservoirs: the atmosphere (air), the total content of biological matter within the biosphere (the global sum of all ecosystems), the hydrosphere (the combined mass of water found on, under, and over the surface of planet Earth), and the

Answer 2

Oxygen cycle is explained below :

1. When the animals respire, they breathe in oxygen and then gives out CO2.

2. This CO2 is used up by the plants to undergo photosynthesis and then plants releases O2.

3. Decaying plants and animals also produces CO2.

4. Again, this CO2 is taken in by the plants and produces O2.

5. The oxygen is breathed in by the animals for respiring and releases CO2. This way the cycle keeps on continuing.