Lesson 2 Activity 4 This is a famous graph called the Keeling Curve. A scientist named Charles Keeling originally created this graph. Starting in the 1950s,

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Presentation transcript:

Lesson 2 Activity 4 This is a famous graph called the Keeling Curve. A scientist named Charles Keeling originally created this graph. Starting in the 1950s, Keeling studied levels of carbon dioxide in the atmosphere at Mauna Loa scientific observatory in Hawaii. Because it is located on an island in the middle of the Pacific Ocean, Mauna Loa is a great place to sample CO2 in the atmosphere. The annual average CO2 that is measured represents the entire globe, but Hawaii is located about 1300 miles north of the equator, and is thus also influenced by seasonal patterns of the Northern Hemisphere.

Driving question What are fossil fuels?

Examples of fossil fuels natural gas coal What is a fossil fuel? Why do they call it a “fossil fuel”? Where do they come from? Gasoline (which comes from oil/petroleum)

Is gasoline organic or inorganic? ZOOMING INTO FOSSIL FUELS Is gasoline organic or inorganic?

What we see… Macroscopic Scale GASOLINE

Zooming in… Atomic-molecular Scale Gasoline (C8H18)

What is gasoline most similar to in terms of atoms? Gasoline (C8H18) Ethanol molecule (C2H6O) Water molecule (H2O) Carbon dioxide (CO2) Glucose (C6H12O6)

What is gasoline most similar to in terms of bonds? Gasoline (C8H18) Ethanol molecule (C2H6O) Water molecule (H2O) Carbon dioxide (CO2) Glucose (C6H12O6)

Which group would gasoline fit into? INORGANIC ORGANIC --means the molecule is CARBON-BASED --and the molecule has C-C and C-H bonds --means the molecule is not CARBON-BASED --and the molecule does not have C-C and C-H bonds Note that CO2 is a linear molecule: O=C=O.

Where is the chemical energy in this picture? 3. The Energy Question Where is the chemical energy in this picture? Remember the rules: energy lasts forever!

3. The Energy Question Where does the chemical energy stored in fossil fuels come from in this picture? Make the point here that chemical energy is important to us because it is the only form of energy that we can transport from one place to another when it is stored in materials. How is chemical energy transported?

How is energy transformed when we burn fossil fuels? 3. The Energy Question How is energy transformed when we burn fossil fuels? Remember the rules: energy lasts forever!

Where does the energy go after we burn fossil fuels? 3. The Energy Question Where does the energy go after we burn fossil fuels? Energy