Vocabulary	Nitrogen Cycle and Nitrogen Fixation	T or F	Nitrogen Fixation	Misc.
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Final Question

_____ ______ is the movement of nitrogen between the enviroment and living things.

_____ ______ is the movement of nitrogen between the enviroment and living things.

nitrogen cycle

What is nitrogen?

an element

____ _____ is bacteria in the soil that is able to change nitrogen gas into forms that plants can use.

Nitrogen Fixation

The breakdown of substances into simpler molecules is called what?

Decomposition

What is a cycle?

any complete round or series of occurrences that repeats or is repeated

Why do organisma need nitrogen?

to build proteinds and DNA for new cells

Animals get nitrogen from what?

plants

_____ in soil convert nitrogen back to gas.

bacteria

______ causes some nitrogen fixation.

lightning

______ releases nitrogen into soil.

Decomposition

When organisms die, decomposers break down the remains.

Two types of decomposers are worms and flowers.

Fire is a way to break down organic matter.

Certain types of bacteria in the soil converts nitrogen to a gas, which is returned to the organism.

Calcium and Vitamin D are examples of what living cells need.

What percent of Earth's atmosphere is nitrogen gas?

about 78%

Can most organisms use nitrogen gas directly.

Name two ways organism get the nitrogen they need.

eating plants or eating organisms that eat plants

Is a relatively small amount of ammonia is produced by lightning.

Yes

Do you think photosynthetic bacteria is an example of Nitrogen Fixation?

Yes it it.

What roots take up nitrogen from soil?

Plant

Without ____ nitrogen could not enter living things or be returned to the atmoshpere.

bacteria

Many _____ pass from soil to plants to animals and back.

nutrients

What carries nitrogen and carbon sometimes?

water

What happens when an organism dies?

it is likely to be recycled or reused

What are the steps of the nitrogen cycle?

Nitrogen fixation, nitrification, assimilation,ammonification, dentrification

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