Process that occurs when water changes from a liquid to a gas (water vapor).

The cooling of water in the atmosphere changing gas (water vapor) to a liquid.

The passage of water vapor from a plant to the atmosphere.

Rainfall that is not absorbed by soil and travels to a water source.

The changes to water when it evaporates into the air, condenses into clouds, and then precipitates down to Earth.

Which process is shown in A?

Which process is shown in B?

Which process is shown in D?

Which process is shown in E?

Which process is shown in C?

The process that maintains Earth's natural balance of carbon dioxide and oxygen.

During this process, the decay of dead organisms releases carbon dioxide into the atmosphere.

The process in which living things break down nutrients to release stored energy.

The process in which organisms use energy from the sun to make glucose/sugar.

Which gas is given off in A?

Which gas is given off in C?

Which gas is taken in by B?

Which gas is given off by D?

Which gas is taken in by E?

Nitrogen gas that is not usable by organisms and must be changed in order to be used.

Organisms that break down compounds in wastes and dead plants and animals, and then return nitrogen to the soil

Process of changing free nitrogen into a usable form of nitrogen.

Organisms that live in the nodules of legumes, and fix nitrogen for use by organisms, then return it to the atmosphere.

Process by which nitrogen is removed from the atmosphere, fixed in the soil by bacteria, used by other living things, and then released back into the atmosphere.

Used to build proteins and complex substances such as DNA in organisms.

Which picture represents what happens 1st in the nitrogen cycle?

Which picture represents what happens 2nd in the nitrogen cycle?

Which picture represents what happens 3rd in the nitrogen cycle?

Which picture represents what happens 4th in the nitrogen cycle?

Which picture represents what happens 5th in the nitrogen cycle?

Which picture represents what happens 6th in the nitrogen cycle?

Which picture represents what happens 7th in the nitrogen cycle?

____________ causes nitrogen gas in the air to change into nitrogen compounds.

Lightning causes nitrogen __________ in the air to change into nitrogen compounds.

Lightning causes nitrogen gas in the air to change into nitrogen __________.

__________ washes nitrogen compounds into the soil.

Rain washes nitrogen compounds into the ________.

__________ use the nitrogen compounds from the soil through the roots to make proteins.

Plants use the nitrogen compounds from the soil through the roots to make _________.

Plants use the nitrogen __________ from the soil through the roots to make proteins.

__________ eat plants and take in protein.

___________ return nitrogen compounds back into the soil from dead plants and animals.

Decomposers return nitrogen compounds back into the soil from _________ plants and __________.

_________ in the soil changes nitrogen compounds back into nitrogen gas.

Bacteria in the soil changes nitrogen __________ back into nitrogen gas.

Bacteria in the soil changes nitrogen compounds back into nitrogen __________.

After the bacteria change the nitrogen compounds back into gas it gets released back into the

Why are these cycles in nature necessary for the survival of living things?

True or False: Planting more trees increases the oxygen in the atmosphere.

True or False: Plants take in carbon dioxide during respiration.

True or False: Animals take in oxygen during respiration.

True or False: Plants release carbon dioxide during photosynthesis.

True or False: Animals exhale carbon dioxide during respiration.

True or False: Burning fossil fuels releases carbon monoxide into the atmosphere.

True or False: Cutting down trees increases carbon dioxide in the atmosphere.