Cycles of LifeCycles of Life

Water CycleWater CycleThe continuous movement of The continuous movement of

water between Earth’s water between Earth’s surface and the air, surface and the air,

changing from liquid to gas changing from liquid to gas to liquid. to liquid.

EvaporationEvaporation

Liquid changes to a gasLiquid changes to a gas

CondensationCondensation

Gas changes to a liquidGas changes to a liquid

PrecipitationPrecipitation

Any form of water particles- Any form of water particles- rain, sleet, snow, or hailrain, sleet, snow, or hail

Water VaporWater Vapor

Water in its gas stateWater in its gas state

WatershedWatershed

An An areaarea on which water flows on which water flows downhill to a common downhill to a common stream, lake, or riverstream, lake, or river

RunoffRunoff

The The waterwater that flows downhill that flows downhill to a common stream, lake, to a common stream, lake,

or riveror river

The Carbon CycleThe Carbon Cycle

The continuous transfer The continuous transfer of carbon between the of carbon between the atmosphere and living atmosphere and living

things.things.

How does carbon enter the air?How does carbon enter the air?

A.A.When plants and animals When plants and animals decaydecay

B.B.When animals breathe outWhen animals breathe out

C.C.When fossil fuels are When fossil fuels are burned (car exhaust)burned (car exhaust)

How do plants use carbon?How do plants use carbon?

Plants use carbon from Plants use carbon from carbon dioxide to carbon dioxide to

make sugars, make sugars, starches, and protein.starches, and protein.

What happens to the carbon when What happens to the carbon when living things die?living things die?

Turned into carbon Turned into carbon dioxide by dioxide by

decomposers OR decomposers OR stored as fossil fuels.stored as fossil fuels.

How do animals use carbon?How do animals use carbon?

Animals use the carbon in Animals use the carbon in sugars, starches, and sugars, starches, and proteins to make their proteins to make their own body chemicals.own body chemicals.

Why do you need nitrogen?Why do you need nitrogen?

To make the parts of your To make the parts of your body such as muscles, body such as muscles,

nerves, skin, bones, blood, nerves, skin, bones, blood, and digestive juices.and digestive juices.

Air is made up of _____% nitrogen.Air is made up of _____% nitrogen.

7878

Animals get nitrogen by Animals get nitrogen by eating proteinseating proteins..

Plants get nitrogen by the Plants get nitrogen by the soilsoil..

Nitrogen CycleNitrogen Cycle

Nitrogen moves between Nitrogen moves between the air, soil, plants, and the air, soil, plants, and

animalsanimals

Name some substances that Name some substances that contain nitrogen.contain nitrogen.

Nitrates and nitritesNitrates and nitrites

DecomposersDecomposers

Organisms that recycle Organisms that recycle matter from dead matter from dead

organismsorganisms

FertilizersFertilizers

Substances used to add Substances used to add minerals to the soil.minerals to the soil.

Inexhaustible ResourceInexhaustible Resource

Will never run outWill never run out

Example: SunExample: Sun

Exhaustible ResourceExhaustible Resource

Can eventually run outCan eventually run out

Examples: paper, metals, Examples: paper, metals, glassglass

Raw MaterialsRaw Materials

The building blocks of The building blocks of products products

Examples: Wood, metal, Examples: Wood, metal, sand, oilsand, oil

Nonrenewable ResourcesNonrenewable Resources

Can eventually be all used upCan eventually be all used up

Can’t reuseCan’t reuse

Examples: Oil, metalsExamples: Oil, metals

Renewable ResourcesRenewable Resources

Can be replaced within timeCan be replaced within time

Examples: PaperExamples: Paper