Unit 23 assignment

Are there any probelms or difficulties with assignment 3 ? for a reminder the following tasks cover the criteria for P3/M3:


P3: Describe energy transfers associated with plants and animals and relate them to the carbon cycle


To obtain P3 Task 1, 2 and 3 must be completed.


Task 1

For this task you are a student who has been asked by your online lecturer to:

Describe photosynthesis as a 2 part process. Your answer must be in essay form and detail -
a) Both stages of photosynthesis using the correct names.
b) Where and how Oxygen, ATP, Hydrogen and Glucose are produced.
c) Within which organelle these stages take place and within which structure.
d) The role of NADP in photosynthesis and where it is found.

e) Formulas for both stages showing the production of ATP and liberation (release) of Oxygen and the use of Hydrogen and CO2 in forming a sugar.

Task 2

Carry out an experiment to determine the effect of light intensity and carbon dioxide concentration on the rate of photosynthesis. The experiment must be written up under the headings of: aim, materials, method, results, conclusion and evaluation.


Task 3

Produce a table which identifies the similarities and differences between Photosynthesis and Respiration in regards to:

· Whether they are carried out in plants or animals.
· The organelle in which they take place
· The reactants and energy sources required.
· The products formed.
· Whether energy is stored or released by the process.
· The names of any electron rich energy carriers.
· The equations for photosynthesis and cellular respiration.
· The role of the process in the carbon cycle


M3: Explain the effects of human activity on carbon dioxide emissions

To obtain M3, Tasks 1 & 2 must be completed.

Explain the effects of human activity on carbon dioxide emissions. Include the following:





a) Human contribution to CO2 emissions- what are the main sources of CO2 emissions, show in the form of a pie chart and comment
b) Changes in CO2 levels in the past 50 years (Illustrate a graph or table of data with an explanation)
c) Is the earth warming up? Provide evidence from data of global temperature readings (remember to reference)
d) Why and how does carbon dioxide affect the earth’s climate? Include the impacts of global warming on: sea level change, weather patterns, human health, food production, ecosystems.
e) Explain what is meant by the term “Carbon Footprint”