Begin filling in the Begin filling in the water cycle word water cycle word definitions (in definitions (in pencil, just in case) pencil, just in case)

Question of Question of the Day: the Day:

Water Cycle Water Cycle & Carbon & Carbon

CycleCycle

The Water CycleThe Water CycleMajor Major Processes:Processes:

PrecipitationPrecipitation InfiltrationInfiltration RunoffRunoff EvaporationEvaporation TranspiratioTranspiratio

nn CondensatioCondensatio

nn

PrecipitationPrecipitation

Water falls to the earth’s Water falls to the earth’s surface as precipitation.surface as precipitation.

Precipitation can be in the Precipitation can be in the form of rain, snow, sleet, hail, form of rain, snow, sleet, hail, fog, etc.fog, etc.

Infiltration & Infiltration & RunoffRunoff

InfiltrationInfiltration When precipitation falls, some of the water is When precipitation falls, some of the water is

soaked up by the ground in a process known as soaked up by the ground in a process known as infiltration. infiltration.

The water in the earth is known as ground The water in the earth is known as ground water.water.

RunoffRunoff When precipitation falls, some of the water is When precipitation falls, some of the water is

not soaked up by the ground. Instead, it not soaked up by the ground. Instead, it remains on the surface and travels downhill.remains on the surface and travels downhill.

The water is known as runoff.The water is known as runoff.

Evaporation & Evaporation & TranspirationTranspiration

EvaporationEvaporation The process in which water changes The process in which water changes

from the liquid form to the gas form.from the liquid form to the gas form. Water evaporates off of lakes, streams, Water evaporates off of lakes, streams,

rivers, oceans, etc. constantly. rivers, oceans, etc. constantly. TranspirationTranspiration

The process in which water evaporates The process in which water evaporates from the leaves of plants.from the leaves of plants.

Transpiration is a sun-driven process.Transpiration is a sun-driven process.

CondensationCondensation The process of water changing from The process of water changing from

the gas form to the liquid form.the gas form to the liquid form.

Water that evaporates rise up in the Water that evaporates rise up in the atmosphere. The water condenses, atmosphere. The water condenses, and clouds form.and clouds form.

Eventually, water is returned to the Eventually, water is returned to the earth’s surface as precipitation. earth’s surface as precipitation.

Carbon CycleCarbon Cycle

Major Processes: Major Processes: Photosynthesis, Cellular Photosynthesis, Cellular Respiration, and CombustionRespiration, and Combustion

PhotosynthesisPhotosynthesis During photosynthesis, plants During photosynthesis, plants

use the sun’s energy, water, and use the sun’s energy, water, and carbon dioxide to make sugar. carbon dioxide to make sugar. They give off oxygen.They give off oxygen.

Photosynthesis takes carbon out Photosynthesis takes carbon out of the atmosphere.of the atmosphere.

COCO22 + H + H22O + solar energy O + solar energy sugar + Osugar + O22

Cellular Cellular RespirationRespiration

Organisms (plants and animals) use Organisms (plants and animals) use oxygen and give off carbon dioxide.oxygen and give off carbon dioxide.

Cellular respiration returns carbon Cellular respiration returns carbon to the atmosphere.to the atmosphere.

Sugar (food) + OSugar (food) + O22 energy + CO energy + CO22 + + HH22O O

CombustionCombustion The burning of fossil fuels The burning of fossil fuels

(coal, oil, and natural gas) is (coal, oil, and natural gas) is known as combustion.known as combustion.

Combustion uses oxygen and Combustion uses oxygen and returns carbon to the returns carbon to the atmosphere.atmosphere.

CO2 (Air)

Oceans act as sink for carbon

Some is release

d

CO2Compressio

n of organic matter

Rocks- CaCO3

limestone Natural Gas

OilFossil

Fuels

Combustion (human & natural)

Respiration

Coal

Switch to handout on carbon Switch to handout on carbon cycle…cycle…

* Add the red words to the * Add the red words to the diagramdiagram

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1. What source of energy ultimately drives the carbon cycle? Explain.

The Sun: It allows plants to pull CO2 out of the air, do photosynthesis and put carbon into plant sugar (C6H12O6) and release O2

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2. In what form is carbon found in the atmosphere? Where does it come from?

CO2 (carbon dioxide).

It is put into the atmosphere by:

1. respiration (plants & animals) AND

2. combustion (burning of fossil fuels & forests)

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3. Cellulose, which makes up the walls of plant cells, contains carbon. What is the source of this carbon?

Cellulose is a complex of carbohydrate (polysaccharide) made of sugar molecules and linked together by plants.

Photosynthesis: Change CO2 into high energy sugar

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4. How does carbon become part of the body of an animal? How is carbon released from the body of of an animal?

Animals eat carbon in plant foods, digest it, and make it into animal body compounds (fat, carb., & protein). Excess carbon is exhaled as CO2

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5. Briefly explain how humans are overloading the carbon cycle.

We are increasing in population & burning more and more fossil fuel (coal, oil, & natural gas) in our homes and industries.

Greenhouse Gas

Excess CO2 traps heat on earth

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Make a list of all the Make a list of all the activities in your lives that activities in your lives that contribute to rising levels contribute to rising levels of carbon dioxide. of carbon dioxide.

How can you reduce your How can you reduce your “carbon footprint” ?“carbon footprint” ?

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