Flow of MatterFlow of MatterCarbon CycleCarbon Cycle

TEKS 12 ae (9abcd)TEKS 12 ae (9abcd)

ObjectivesObjectives

1.1. Be able to analyze the flow of Be able to analyze the flow of

energy through the Carbon cycle.energy through the Carbon cycle.

2.2. Be able to analyze changes caused Be able to analyze changes caused

by human and natural occurrences.by human and natural occurrences.

What is CarbonWhat is Carbon

Carbon Carbon is a chemical element. Look at is a chemical element. Look at the periodic table at the front of the the periodic table at the front of the room.room.

1.1. What group is carbon in? ________What group is carbon in? ________

2.2. What is the atomic mass? ________What is the atomic mass? ________

3.3. How many protons? __________How many protons? __________

…….but why is carbon so important?.but why is carbon so important?

What is CarbonWhat is Carbon

From proteins to sugars, carbon is the building block of the molecules of life.

Linked carbon atoms form the frame for molecules produced by plants and other living things.

Organisms use these carbon molecules Organisms use these carbon molecules for growth and energy.for growth and energy.

What is CarbonWhat is Carbon

For example, atoms of carbon can be found in the framework for proteins, carbohydrates, fats and more…

PROTEIN – myoglobin 3d Figure

What is carbonWhat is carbon

1. Carbon is found in many forms, a few examples are: graphite, diamond and coal

GRAPHITE

DIAMONDS

What is CarbonWhat is Carbon

Notice how the graphite was black and the diamond was clear.

Different forms of carbon have different Characteristics.

Graphite, Diamonds and Coal are all allotropes, which means that they are all the same element, but have formed different types of bonds.

What is CarbonWhat is Carbon

In fact, carbon has an even more important role on earth that graphite, diamonds and coal.

Does anyone know what it is?

Carbon is the basis for all living things.

All living things are said to be organic and contribute to the biotic factors.

Carbon CycleCarbon Cycle

Let’s examine the carbon cycle starting with autotrophs.

During photosynthesis autotrophs take energy from the sun and convert carbon dioxide gas into energy rich carbon molecules.

These carbon molecules are used for food and energy.

Carbon Cycle…a closer look…Carbon Cycle…a closer look…

This chemical equation represents photosynthesis.

6H2O + 6CO2 ----------> C6H12O6+ 6O2

Water + Carbon Dioxide --turns into- Sugar + Oxygen

Sunlight

Looking at the formula above, explain how the carbon cycle relates to living organisms….and how to living organisms turn sugar back into CO2 and H2O

Carbon CycleCarbon Cycle

Does anyone have an example of an autotroph that does photosynthesis?

When the autotrophs and heterotrophs use the carbon-containing molecules and release energy, carbon dioxide is released and returned to the atmosphere.

This process is the opposite of photosynthesis and is called Respiration.

Carbon CycleCarbon CycleThe

carbon cycle

The carbon cycle

Atmospheric CO2

Dissolved CO2

Open burning Photosynthesis

RespirationRespiration Fuel Combustion

Fuel Combustion

Photosynthesis

Respiration

Death and decay

Death and decay

Fossil fuels

Humans and CarbonHumans and Carbon

How have humans influenced the carbon cycle?

With a partner come up with ways that humans influence the carbon cycle.

Be ready to share your ideas with the class.

Humans and CarbonHumans and Carbon

Scientists have been measuring the atmospheric CO2 over the past 50 years…

What do you think they discovered about the amount of CO2 in the atmosphere???

Humans and CarbonHumans and Carbon

It has sky

rocketed!

Human and CarbonHuman and Carbon

But why?

Let’s brainstorm ways

That CO2 can get

Into the atmosphere

Carbon and HumansCarbon and Humans

Burning of fossil fuels is a major contributor Burning of fossil fuels is a major contributor to the increase in the atmospheric levels to the increase in the atmospheric levels of COof CO22

Carbon and HumansCarbon and Humans

Another contributor is the clearing of trees Another contributor is the clearing of trees and plants. Why would this make levels of and plants. Why would this make levels of COCO22 higher? higher?

(think about what the plants do….)(think about what the plants do….)

This graph shows This graph shows the change in the change in atmospheric carbon atmospheric carbon dioxide since 1960dioxide since 1960

What is the result What is the result of this change now of this change now and for our future?and for our future?

Visionlearning, Inc. & National Science Found.

Carbon and HumansCarbon and Humans

Because COBecause CO22 increases the atmosphere’s increases the atmosphere’s

ability to hold heat, it has been called a ability to hold heat, it has been called a “greenhouse gas.” “greenhouse gas.”

ReviewReview

Remember, these were your goals…Remember, these were your goals…

1.1. Be able to analyze the flow of Be able to analyze the flow of

energy through the Carbon cycle.energy through the Carbon cycle.

2.2. Be able to analyze changes caused Be able to analyze changes caused

by human and natural occurrences.by human and natural occurrences.

ReviewReview

List 3 processes that move carbon through List 3 processes that move carbon through the environment.the environment.

1.1. ______________________________________

2.2. ______________________________________

3.3. ______________________________________

Photosynthesis, Respiration, Fuel Photosynthesis, Respiration, Fuel Combustion, Open Burning, Forest Combustion, Open Burning, Forest Burning, Death/DecayBurning, Death/Decay

ReviewReview

Which of the following would decrease the Which of the following would decrease the amount of carbon dioxide in the air?amount of carbon dioxide in the air?

A.A. A growing maple treeA growing maple tree

B.B. A running DogA running Dog

C.C. A person driving a carA person driving a car

D.D. A burning forestA burning forest

ReviewReview

Explain the relationship between Explain the relationship between Photosynthesis and Respiration.Photosynthesis and Respiration.

Now you will do an experiment with Now you will do an experiment with Carbon... Carbon...