Nutrient Cycle

NUTRIENT CYCLE

The constant supply of energy to Earth from the Sun. The Sun replaces energy lost as it passes from link to link in a food chain. New energy is therefore always entering food chains from plants. However, the same is not true of nutrients or other chemicals essential to life, such as water. There is a finite, or limited, amount of these on our planet. They must be cycled around the ecosystems constantly if life is to be sustained

Just Biology Nutrient-Cycles.pptx

Oxygen Cycle

In a simple example of the oxygen cycle (diagram on the left), you can see how oxygen is used and cycled by plants and animals. 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 cow breathes in the oxygen and then breathes out carbon dioxide. The plant can then use this carbon dioxide and the cycle is complete.

Water cycle

Water cycle, involves the continuous circulation of water in the atmosphere system and on Earth. There are many processes involved in the water cycle, the most important are evaporation, transpiration, condensation, precipitation, and runoff.

The water cycle has no starting point no end point as the beginning can also be refereed to as the end. Hence it is a cycle as shown in the diagram on the left

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