yacomine_essential biology 05.2 the greenhouse effect_31110

Essential Biology 5.2 The Greenhouse Effect Due Date:

Student Name: Candidate Number: 002171-xxx

Blog resource: http://tinyurl.com/3a4g5ez

Cite all sources using the CSE method (or ISO 690 Numerical in Word). The first example has been done for you.

Complete the self-assessment rubric before submitting to Moodle. Avoid printing this if possible.

1. Annotate the diagram to show the carbon cycle and processes involved.

A Respiration (1) B Photosynthesis C Fossil Fuel EmissionsD Decomposition E Egestion

2. Outline some of the methods used to measure or estimate atmospheric carbon dioxide.

Recent history: A method used to measure atmospheric carbon dioxide is to measure it over a period of time and record the trend and annual cycles.

Geological history: A method used to estimate atmospheric carbon dioxide is to analyze the CO2 concentration of air bubbles trapped in the ice and estimate the year based on the depth of the core.

Stephen Taylor Bandung International School http://sciencevideos.wordpress.com

http://sciencevideos.wordpress.com/

http://tinyurl.com/3a4g5ez



3. The topic of increasing carbon dioxide levels in the atmosphere has been the source of intense debate with regard to climate change in recent years. This graph shows the famous ‘Keeling Curve’ from Mauna Loa laboratory in Hawaii. Find out more here: http://earthguide.ucsd.edu/globalchange/keeling_curve/01.html

a. Describe the overall trend shown in the graph. The overall trend is that there is an increase in atmospheric CO2 levels in Mauna Loa every year.

b. Explain the annual fluctuations in CO2 levels.

Peaks: The annual peaks in CO2 levels are due to the winter months of each year.

Troughs: The annual troughs in CO2 levels come from the summers in the northern hemisphere. This side of the planet has the greatest land mass and during the summer many trees and plants grow. With more photoautotrophic organisms, there is more photosynthesis and therefore more of a decrease of CO2 from the atmosphere.

c. Suggest one human impact and one natural cause that could have led to the overall trend shown in the graph:

Anthropogenic: One human impact that could have led to the trend is cutting down trees, which means there are less trees to perform photosynthesis and therefore more CO2 in the atmosphere.



http://earthguide.ucsd.edu/globalchange/keeling_curve/01.html



Natural: a natural cause that could have led to the trend is natural disasters. With natural disasters knocking down and otherwise destroying trees, there would be a loss of photoautotrophic organisms and therefore more atmospheric CO2.

4. Identify three greenhouse gases other than carbon dioxide. Three greenhouse gases are water vapor, methane and nitrous oxide.

5. Explain the greenhouse effect with the aid of a diagram. Include short-wave and long-wave radiation.

6. Explain how increased atmospheric levels of greenhouse gases lead to an enhanced greenhouse effect. Increased atmospheric levels of greenhouse gases lead to an enhanced greenhouse effect because instead of being lost in space, more radiation is reflected back to earth because of the increase.





7. Outline some of the possible consequences of a global temperature rise on arctic ecosystems.Ice coverage:

Climate changes: Increased global temperatures will shift the characteristics of the world’s biomes.

Niches: The niches will no longer exist in the same form, which will change which populations migrate to that area.

Plant distributions:

Animal populations: As the niches change, different species will migrate to the area to take advantage of this change.

8. Outline the precautionary principle. The precautionary principle is a principle that states that if an action could harm others or the environment, the action cannot be performed unless it is proven safe.

9. Describe how the precautionary principle can be applied to anthropogenic climate destabilization. An example to describe this is transporting oil across the ocean. The oil would not be allowed to be transferred until the method of transport was deemed safe.

10. Give two other examples of the precautionary principle in effect in Biology or Medicine.





11. Evaluate the precautionary principle as a justification for taking strong action in response to the threats posed by the enhanced greenhouse effect. What are some of the steps that we could take? This video might help: http://www.youtube.com/watch?v=mF_anaVcCXg

Take significant action Take no action

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Conclusion:



http://www.youtube.com/watch?v=mF_anaVcCXg



Works Cited1. Taylor, Stephen. 5.2 Greenhouse Effect (presentation). Science Video Resources. [Online] Septmber 2009. http://sciencevideos.wordpress.com/bis-ib-diploma-programme-biology/05-ecology-and-evolution/the-greenhouse-effect/.

2. Allott, Andrew. IB Study Guide: Biology for the IB Diploma. s.l. : Oxford University Press, 2007. 978-0-19-915143-1.

Self Assessment:

Essential Biology Assessment

Criterion Complete (2) Partially complete (1) Self MrTPresentation &

Organization NA Complete and neat. All command terms highlighted, tables and diagrams well presented.

0

Academic Honesty NA

Sources cited using the CSE (ISO 690 numerical) method, with Works Cited section complete and correct.

1

Objective 1 understanding

All answers for the following command terms correct:

Most answers for the following command terms correct: 2

Define Draw Label List Measure State

Objective 2 understanding

All answers for the following command terms correct: Most answers for the following command terms correct: 2

Annotate Apply Calculate Describe Distinguish Estimate Identify Outline

Objective3understanding

All answers for the following command terms correct: Most answers for the following command terms correct:

1Analyse Comment Compare Construct Deduce Derive Design Determine Discuss

Evaluate Explain Predict Show Solve Sketch Suggest

Logic, notation, mathematical

workingNA

Answers are presented in a logical and concise manner. SI units used most times, with correct

unit symbols and definitions of terms. All mathematical working shown.

1

Further research NA

Evidence is apparent of research and reading beyond the textbook and presentations to find correct answers to challenging questions. If any questions are unanswered, this criterion scores

zero.

0

Total (max 10): 7



yacomine_essential biology 05.2 the greenhouse effect_31110

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