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Cycles in the Biosphere

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Emma Maxon

on 18 February 2016

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Transcript of Cycles in the Biosphere

Water Cycle
Carbon and Oxygen Cycles
Carbon and Oxygen both are necessary molecules for life

During photosynthesis, plants convert Carbon Dioxide into carbohydrates and oxygen
Organisms use these resources to survive
Nitrogen Cycle
Nitrogen is found mostly in the atmosphere

Living things can't use nitrogen directly

Nitrogen Fixation:
Has to be captured by bacteria and is converted to usable nitrogen

Humans add nitrogen by using chemical fertilizers


Carbon and Oxygen Cycles
Carbon can get buried beneath the surface and converted into coal, gas, oil

When the fuels are used, will release CO2 back into the atmosphere


Thank you!
Cycles in the Biosphere
The Law of Conservation of Mass states:
Matter cannot be created nor destroyed

Matter:
anything that has mass and takes up space
Provides nutrients throughout the ecosystem

In an ecosystem matter is constantly being recycled

Nutrient:
a chemical substance organisms need to go through life processes
Phosphorus Cycle
Phosphorous is needed for organism growth and development

As time goes on, weathering causes rocks to break apart and become part of the soil, releasing phosphate minerals

Plants use this soil and obtain the phosphate and as animals consume the plants they receive it as well

When the organism dies, the phosphate returns to the soil

Bacteria make it possible for the phosphate to be used by organisms
Nitrogen Cycle
Nitrogen enters the food web when plants absorb nitrogen from the soil, converts it to proteins

Consumers eat the plants that contain nitrogen and receive the nitrogen

Nitrogen returns to the soil when animals release waste and when organisms die

Denitrification:
when soil bacteria convert nitrogen back into gaseous nitrogen
Cycles in the Biosphere
Cycling of nutrients involves living and nonliving matter

Biogeochemical Cycle:
the exchange of matter through the biosphere

Ex.
Rocks are broken down by weathering.
The broken pieces of rock become part of soil used by plants and animals to grow
Transpiration:
when water evaporates into the atmosphere off of plants

Evaporation:
water heats up and becomes water vapor in the atmosphere

Condensation: water vapor collects and begins forming water droplets

Precipitation: Water droplets that form clouds become to large and fall to earth (rain, snow, etc)

Runoff:
Water runs off of Earth's surface back into lakes, streams, etc
Full transcript