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Practical Revision iGCSE
Transcript of Practical Revision iGCSE
Key marking points
Model answers> CORMS
Make a list of the practicals you have done over the course
The images may help you!
Write down a definition of the following variables
Other key words
Tests for Glucose, Starch, Lipids and Protein
Illustrate how enzyme activity can be affected by changes in temperature (TRIPLE pH)
Demonstrate Diffusion and Osmosis
Determine the energy content of a food sample (TRIPLE)
Demonstrate the evolution of carbon dioxide and heat from respiring seeds (TRIPLE)
Investigate the effect of light on gas exchange from a leaf using a hydrogen carbonate indicator (TRIPLE)
Investigate the effect of exercise on breathing
Investigate the role of environmental factors in determining the rate of transpiration from a leafy shoot
Investigate the effect of exercise on heart rate
Show how the sensitivity of the skin differs
Compare floral structure in insect-pollinated and wind-pollinated flowers
Demonstrate phototropic and geotropic plant growth responses
Use quadrats to estimate the population size of an organisms in two different areas
Investigate carbon dioxide production in yeast in different conditions
Each group will be given a practical
Work through the question sheet to plan out the practical thoroughly
The equipment for each practical is available so you can demonstrate how to use it
You will then teach the rest of the class how to do the practical
What is your experiment called?
What are you investigating?
state the effect of the independent variable on the dependent variable
What is the scientific theory?
–what will you use to carry out the experiment?
State the variables:
Effect of temperature on enzyme activity (Konstantin)
Investigate the rate of photosynthesis in pondweed (Jil)
Investigate the effect of exercise on heart rate and breathing rate (Linda)
Show how the sensitivity of the skin differs (Stephan)
Use quadrats to estimate the population size of an organism in two different areas. (leon)
Investigate the effect of light on gas exchange in a leaf using hydrogen carbonate indicator ( Cailin)
Describe how you will carry out the experiment.
How will you ensure it is reliable and valid?
How will you display your results?
What should the results show?
How would you prove the experiment was reliable/valid?