GCSE Additional ScienceISA

Photosynthesis & Limiting Factors

Schedule

• 2x candidate research lessons

• 1x candidate research homework

• Then…

• Section 1 exam + table drawn

• Practical + graph drawn

• Section 2 exam

CRN Overview

• Context

• Hypothesis

• Method(s)

• Equipment

• Risk Assessment

• References

• Hypothesis

Context

• Mr John grows tomatoes in large-scale greenhouses in Somerset.

• He has approached you, asking you to investigate the effect of limiting factors on photosynthesis. The results from your work will help Mr John maximise the yield of his crop by controlling the limiting factors of photosynthesis.

End 10 Minutes

Hypothesis

• Prediction: “As [independent variable] increases, [dependent variable] will [decrease/increase/remain constant].

• Hypothesis: prediction + scientific explanation.

5 MinutesEnd

Method(s)

• Identify Independent Variable, Dependent Variable, several Control Variables.

• Reliability?

• Measurements?

• Could your parents follow the method correctly?

End 15 Minutes

Equipment

• List all pieces of equipment you will use in the method.

5 MinutesEnd

Risk Assessment

1. Identify 2 hazards: the possible accident.

2. Their risks: the probability of them happening.

3. Your precautions: what you will do to reduce these risks.

10 MinutesEnd

References

• Books:

– [Title], [Author], [Year Published]

• Webpages:

– [Title], [Author], [Date Accessed]

10 MinutesEnd

NOT Nelson Thornes –that’s the publisher!