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Photosynthesis rate;
  limiting factors
Learning outcomes
•Identify and explain the factors that limit
photosynthesis (Grade C)
light intensity (Grade C)
•interpret data on the rate-limiting factors in
photosynthesis (Grade C)
•Consider different conditions and relate this to data
collection (Grade A)
Keywords- ?
       *Suggest the keywords from this lesson
In pairs

Use a whiteboard to list all the
factors that limit the Rate of
photosynthesis
Why do bluebells flower in
April and May, rather than
later summer months?
What other factors could influence
the growth of the bluebells?


What environmental conditions can
affect the process of photosynthesis?

* You should be able to answer these questions
using scientific ideas and the appropriate keywords
How do
                                plants limit
                                water loss?




 ... close to conserve water.
(Magnification X 400.)
The stomata on the underside of leaves open to allow gases to move
in and out of the leaf. (Magnification X 400.)
complete Activity AB4.8.1 Effect of light
intensity on photosynthesis and produce
graphs of your data


How do the repeated measurements
allow us to estimate a range within
which the true value probably lies?

We carried out the activity using lamps to model the Sun, collecting data
using the independent variable of ‘Distance from light source (cm)’
What may be preventing the rate of
photosynthesis from continuing to
rise at higher light intensities?
Keywords

Photosynthesis, environment, light intensity,
limiting factor,
Refer to the difference in data
means under different conditions
and the variation within each set
of data measurements

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B4 08 photosynthesis- rate-limiting factors

  • 1. Photosynthesis rate; limiting factors
  • 2. Learning outcomes •Identify and explain the factors that limit photosynthesis (Grade C) light intensity (Grade C) •interpret data on the rate-limiting factors in photosynthesis (Grade C) •Consider different conditions and relate this to data collection (Grade A) Keywords- ? *Suggest the keywords from this lesson
  • 3. In pairs Use a whiteboard to list all the factors that limit the Rate of photosynthesis
  • 4. Why do bluebells flower in April and May, rather than later summer months?
  • 5. What other factors could influence the growth of the bluebells? What environmental conditions can affect the process of photosynthesis? * You should be able to answer these questions using scientific ideas and the appropriate keywords
  • 6. How do plants limit water loss? ... close to conserve water. (Magnification X 400.)
  • 7. The stomata on the underside of leaves open to allow gases to move in and out of the leaf. (Magnification X 400.)
  • 8. complete Activity AB4.8.1 Effect of light intensity on photosynthesis and produce graphs of your data How do the repeated measurements allow us to estimate a range within which the true value probably lies? We carried out the activity using lamps to model the Sun, collecting data using the independent variable of ‘Distance from light source (cm)’
  • 9.
  • 10. What may be preventing the rate of photosynthesis from continuing to rise at higher light intensities?
  • 11. Keywords Photosynthesis, environment, light intensity, limiting factor,
  • 12. Refer to the difference in data means under different conditions and the variation within each set of data measurements