Sunday, 17 November 2019

Climate and the Carbon cycle. Questionnaire.

A. Climate and the Carbon cycle I




  1. How do the carbon cycle, climate and the environment influence each other?
  2. How does the carbon cycle regulate the temperature of Earth's atmosphere? 
  3. Will carbon dioxide continue to rise, and if so, what can we do about it?

B. Living in a Carbon World Part D: Fossil Fuels, Hydrocarbons and CO2





4. Click on the links below to view the graphs    and watch the video.

  1. Graph 1: Illustrates the amount of CO2emissions moving into the atmosphere from the combustion of the three most important fossil fuels: oil, gas, and coal from 1880-2004.
  • Graph 2 and Graph 3: Go to NASA's Global Climate Change - Vital Signs of the Planet to investigate changes in atmospheric CO2data. 
    • Graph 4: Go to NASA's Vital Signs for Global Land-Ocean Temperature Index. This data represents temperatures that are above or below a 30 year average of temperature measurements taken from 1950-1980.
    • Graph 5: 1000 years of Fossil Fuels allows you to compare trends in three datasets: fossil fuels, CO2 and temperature.
    • Video 1: NASA, a year the life of Earth's CO2 . In this video animation, NASA scientists have compressed a year's worth of CO2 data into one year. Can you identify the three areas of the world producing the most CO2?

    5. Describe how combustion can move carbon atoms from being stored deep in the ground to the atmosphere.
    6.  Identify and explain at least one piece of evidence supporting or refuting the claim that humans are changing the carbon chemistry of the atmosphere.

    C. CARBON ON THE MOVE!



    7. Examine the terrestrial food web image, taking time to follow the carbon. Remember that carbon atoms move as part of a carbon compound, not as single atoms.
    8. Then, check your understanding of how carbon moves through food webs by answering the Checking In  questions.
    9.  Examine the Terrestrial Carbon Cycle food web diagram again. Describe how the carbon atoms in carbon dioxide molecules originally found in the atmosphere can end up in a coyote. Use a diagram to help you explain your answer if you need to.


    D.  Living in a Carbon World



    Part A: Trees - The Carbon Storage Experts


    10. Write down ideas of where you think the mass of the Giant Sequoia tree comes from as it grows and then create a class list of all possible ideas.

    11. Compare and discuss people's hypotheses from the video with your class's ideas about where the mass of a tree comes from.
    • Which items on both lists are misconceptions about how a tree grows and adds mass.
    • Where does a tree actually get most of its mass from?

    12. Checking In
    1. Where do you think the carbon atoms in the glucose molecule originally came from? Choose all that apply.
    2. Where do you think the carbon atoms in the cellulose molecule originally came from? Choose all that apply.


    5.     Where do you think the carbon atoms in the cellulose molecule originally came from? Choose all that apply.

    13.  Checking In

    Check your understanding of where carbon goes once it enters a tree by answering the questions below. Check all that apply.
    1. Carbon dioxide (CO2) in the air enters a tree via the process(es) of .......?

    2. Once CO2 enters the leaves of a tree, the carbon atoms can eventually move to........?

    3. Under which of the following conditions would a tree add biomass and grow?

    4. Carbon atoms get stored in new organic carbon compounds created by what process?

    5. The source of a tree's biomass is mostly from...?

    5. Checking In

    Check your understanding of where carbon goes once it enters a tree by answering the questions below. Check all that apply.
    1. Carbon dioxide (CO2) in the air enters a tree via the process(es) of .......?

    2. Once CO2 enters the leaves of a tree, the carbon atoms can eventually move to........?

    3. Under which of the following conditions would a tree add biomass and grow?

    4. Carbon atoms get stored in new organic carbon compounds created by what process?

    5. The source of a tree's biomass is mostly from...?

    Stop and Think

    14. : Using the tree diagram above to help you, explain why trees (and all plants) represent a small but complete carbon cycle. Draw your own diagram to help you illustrate your answer.
    Part B: Carbon Storage in Local Trees

    15. Why should we care about how much carbon a tree stores?

    16. Lab investigation: How Much Carbon is Stored in a Local Tree?

              a. Calculate the approximate mass of carbon atoms stored in your tree in kilograms(kg). . 
             b.  Scientists have determined that 1 kg of carbon is equivalent to approximately 3.67 kg of CO2. Thus, multiplying the carbon stored (kg) in your tree by 3.67 will give you an approximate measure of CO2 taken in via photosynthesis and stored in the tree. 

    Checking In

    How many kg of CO2 did your single local tree remove from the atmosphere and store in its biomass?

    17. Explain how planting and growing more trees could mitigate this warming trend in global temperature.

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