Biology Cycles

Name: ______Period: ___ Date:______

Please open a dragonflytext bookto page 74 and read 3-3. Answer the following questions as you read. There are analysis that aren't straight from the book that you to answer as well.

1.What are the four elements that make up over 95% of the body in most organisms? ______

2.How is the movement of matter through the biosphere different from the flow of energy?______

______

3.Matter moves through an ecosystem in ______

4.What do biogeochemical cycles connect? ______

______

The Water Cycle

5.Water can enter the atmosphere by evaporating from the leaves of plants in the process of ______

6.What is evaporation? ______

7.What is transpiration? ______

ANALYSIS

  1. What is the difference between transpiration and evaporation?
  1. What human actions could impact the water cycle? Explain how these actions could impact the water cycle.
  1. Explain which components of the water cycle most directly involve biotic factors.

The Nutrient Cycle (Carbon and Nitrogen)

  1. What are nutrients?______

______

  1. What are the 3 cycles that play especially prominent in the biosphere?

1. 2. 3.

Carbon Cycle

  1. Why is carbon especially important to living systems? ______

______

  1. What are the 3 large reservoirs where carbon is found in the biosphere?
  2. As carbon dioxide gas in the ______
  3. As dissolved carbon dioxide in the ______
  4. As coal, petroleum and calcium carbonate rock found______
  5. In what process do plants use carbon dioxide? ______

ANALYSIS

  1. When fossil fuels are burned (ex: methane, CH4), what happens to the amount of CO2 in the atmosphere?
  1. Describe the cyclic relationship between photosynthesis and cellular respiration.

Photosynthesis ______CO2 from the atmosphere and cellular respiration ______CO2 to the atmosphere.

  1. As the human population increases and we drive more and more cars, what happens to the amount of CO2 in the atmosphere?
  1. In the atmosphere, CO2 and other greenhouse gases trap heat between the earth and the atmosphere. It is believed that the increase of greenhouse gaseswill lead to global warming (a rise in average global temperature).

1.What human actions increase the amount of global warming?

2.Explain how these actions could impact the carbon cycle.

Nitrogen Cycle

  1. Why do all organisms require nitrogen? ______

______

  1. What is nitrogen fixation? ______

______

  1. What is denitrification?______

______

  1. What role does denitrification play in the nitrogen cycle?______

______

ANALYSIS

  1. What role do the nitrogen-fixing bacteria play in the nitrogen cycle?
  1. What human actions could impact the nitrogen cycle? Explain
  1. How do living organisms obtain nitrogen for use in their bodies? In your answer, identify which macromolecule(s) contain this nitrogen.

Nutrient Limitation

  1. What is the primary productivity of an ecosystem? ______

______

  1. If a nutrient is in short supply in an ecosystem, how will it affect an organism? ______
  2. When is a substance called a limiting nutrient? ______

______

  1. Why do algal blooms occur? ______

______

Gallery Walk: Answer the questions from each station in the box below!

Station 1: / Station 2:
Station 3: / Station 4:
Station 5: / Station 6:
Station 7: / Station 8:
Station 9: / Station 10: