Bell Ringer

Give two reasons that the frogs could be going extinct?

• Yesterday we discussed………………… • Today we are discussing

What is the value of the wolf?

• I can describe how humans impact the carbon cycle.

• I can explain how the burning of fossil fuels affects the carbon cycle.

• The Carbon Cycle and the Human Impact” How do humans impact the carbon cycle? Page 56-58 Science IV

• Hand out page 56-59 The Carbon Cycle

Carbon is…………..

• Carbon is the key element for living things.• Carbon can be found in the atmosphere • Carbon can be found dissolved in the oceans

primary in the form of CO2 • 50-70 billion tons of Carbon from inorganic

carbon dioxide are recycled into more complex organic substances.

• “Carbon Cycle” Read ( I will allow a few minutes)

• Why do you think that photosynthesis and respiration are considered to be complementary processes? (on paper)

• Explain how burning if fossil fuels by humans affect the carbon cycle.

3.• Scientist have expressed concerns about the

burning of the rainforests to clear land for farming.

• A. Explain how the burning of the forests could change oxygen levels in the atmosphere.

• B. What impact would the change in oxygen levels have on living things?

• C. How would the change affect the ecosystem of the rainforest?

Homework from Yesterday!Please copy down!

• Explain why the life cycle and skin of the frog make it a good indicator animal if you want to determine the health of local ecosystems.

• B. Construct a concept web (graphic organizer) that links the decline in the number of frogs to the factors that may cause the decline.

• C. Choose one of the possible causes and , using your own words, explain how it affects the frogs.

Homework due 11-16-09

• “Homework” What is the value of the wolves”? pages 18-19 Prepare a written position: Should wolves have been captured in Canada and shipped to Yellowstone national Park? You will choose to support/or develop an alternative view:

• Use the library, the web, to find information that will support your position and write a 2-3 page typed report on the results of your research.