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What is the Nitrogen Cycle?

• The Nitrogen Cycle is when the sun gives off its energy to the plants, when they make photosynthesis. When the plants are finished with this process, they release big amounts of carbon and oxygen into the animals that eat the plant. Then, animals’ respiration process, or breathing process happens. The animal releases the carbon back into the atmosphere, back to the plants, which start it all over again.

• The Nitrogen Cycle is when bacteria takes nitrogen from the atmosphere and draws it into the soil, so that plants can be able to use it. Plants then change the nitrogen into amino acids and or proteins. The animals get the nitrogen from the plant that they eat, or other animals that eat the plants. When animals die, microbes take apart the dead animal and release the nitrogen back into the soil.

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What is a food chain?

• A hierarchical series of organisms each dependent on the next as a source of food.

• A series of webs and pages of different species all in one ecosystem.

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What is a food web?

• A system of interlocking and interdependent food chains

• A system of populations decreasing and increasing at the same time everyday of the year

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What is a Decomposer?

• An organism that eats all of the plants an fungi

• An organism that breaks down the dead body of an animal

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What does Trophic Level mean?

• Each several levels in an ecosystem charted in an energy pyramid

• Each several animals in an ecosystem in a food web

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What is an Energy Pyramid?

• A model that show how many of each species that there is in one ecosystem all over the world

• A graphic model of energy cycling through trophic levels in an ecosystem

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What does Biomass mean?

• The minimum mass of organisms

• The maximum mass of organisms

• The total mass of organisms

What does Excretion mean?

• The process of respiration

• The process of eliminating waste matter

• The process of photosynthesis

• The process of chemical reactions

What is Fossil Fuel?

• A natural fuel such as coal, or gas

• A natural animal, not genetically made

• Natural Resources

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What is the role of producers in an ecosystem?

• They decompose organic matter.

• They produce energy through photosynthesis.

• They consume other organisms for energy.

• They recycle nutrients back into the soil.

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