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...