Oxygen Cycle

Oxygenis an important element to life on Earth. It is the most common element of the human body. It makes up about 65% of the mass of the human body. Most of this is in the form of water (H2O). Oxygen also makes up about 30% of the Earth and 20% of the atmosphere.

Must Read: Topography

The Oxygen Cycle

Oxygen is constantly being used and created by different processes on planet Earth. All of these processes together make up the oxygen cycle. The oxygen cycle is interconnected with the carbon cycle.

Plants are the main creators of oxygen in the atmosphere through the process of photosynthesis. Here the tree
uses sunlight and carbon dioxide to produce energy and releases oxygen. The giraffe breathes in the oxygen and then breathes out carbon dioxide. The plant can then use this carbon dioxide and the cycle is complete.

Also Read : Water Cycle

Processes That Use Oxygen

  • Breathing – The scientific name for breathing is respiration. All animals and plants use up oxygen when they breathe. They breathe in oxygen and breathe out carbon dioxide.
  • Decomposing – When plants and animals die, they decompose. This process uses up oxygen and releases
    carbon dioxide.
  • Rusting – This is also called oxidation. When things rust they use up oxygen.
  • Combustion – There are three things needed for fire: oxygen, fuel, and heat. Without oxygen, you can’t have a fire. When things burn, they use up oxygen and replace it with carbon dioxide.

Have a Look at: Erosion

Processes That Produce Oxygen

  • Plants – Plants create the majority of the oxygen we breathe through a process called photosynthesis. In this process, plants use carbon dioxide, sunlight, and water to create energy. In the process, they also create oxygen which they release into the air.
  • Sunlight – Some oxygen is produced when sunlight reacts with water vapor in the atmosphere.

Fun Fact About Oxygen Cycle

  • Even though fish breathe under water they still breathe oxygen. Their gills extract the oxygen from the
    water.
  • There is a lot of oxygen stored up in the oxide minerals of the Earth’s crust. However, this oxygen isn’t
    available for us to breathe.
  • One of the biggest sources of oxygen is phytoplankton that lives near the surface of the ocean. Phytoplankton is tiny little plants but there are lots of them.

Must Read:

Minerals: India’s Mineral Resources

Rock – Bunch of Different Minerals

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