Question

What is the energy cycle?

Answer 1

⁠⁠⁠⁠⁠Energy cycle:

1. The biogeochemical cycle which utilizes or releases energy through various biochemical processes such as respiration and photosynthesis is termed an energy cycle.
2. The Sun is the main source of energy for all the processes or activities taking place on Earth. The energy obtained from the sun is called solar energy which ensures whatever the energy is taken by us (living organisms) from the earth and its atmosphere is returned to it back through some way.
3. For example, the body of human beings is composed of carbon, nitrogen, and oxygen compounds which are returned to the atmosphere in their elemental form.
4. Human beings return oxygen in the form of carbon dioxide by respiration and water is returned in the form of urine or sweat to the atmosphere.