Carbon dioxide and oxygen cycle

Carbonand

Oxygen Cycle

Dioxide

Plants and animals absorb nutrients from gas or soluble salts

Nutrient – a substance (element or compound) that promotes growth and health in living things Oxygen, carbon, hydrogen and

nitrogen are needed in large quantities – these are known as macronutrientsTrace elements such as magnesium, sulphur and phosphorous are called micronutrients

The Nutrient Cycle

the Fuel of LifeNutrient:

The Carbon-Oxygen Cycle is interconnected and involves three major processes and one minor process:

The Carbon Dioxide

and Oxygen Cycle

1.Photosynthesis

2.Respiration3.Combustion4.Decompositi

on

Photosynthesis During this process, plants take in carbon dioxide

(CO2) and absorb water (H2O) with the help of their roots. The chlorophyll present in the leaves and the energy from the sun, helps convert CO2 and H2O into Oxygen O2, sugar and water vapor. Oxygen (O2) is released by the plants as a by-product into the atmosphere.

RespirationRespiration occurs when animals take in oxygen from the air along with simple sugars from their food. This helps in release of carbon dioxide, water and energy from the animal body. During cellular respiration, animals require O2 while inhalation. When they exhale the waste product of cellular respiration, they release CO2 into the atmosphere again.

CombustionIt is a process of burning that occurs naturally in the nature.

For example:volcanic eruptions are natural

combustion processes where carbon dioxide is released into the atmosphere due to burning

Decomposition

When an animal or a plant dies, all the carbon, oxygen, nitrogen, water, calcium, etc. return to the soil and air during decomposition.

Certain insects, fungi, and bacteria aid in the decomposition process and are called decomposers.

Putting it all together…

Photosynthesis


Respiration


Combustion


Decomposition

Carbon dioxide and oxygen cycle

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