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

... close to conserve water. (Magnification X 400.)

How do plants limit water loss?

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