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Practical Revision iGCSE

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Paul Sheffield

on 25 March 2015

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Transcript of Practical Revision iGCSE

Practical Revision iGCSE
L.O
Key language
Key marking points
Model answers> CORMS

Starter
Make a list of the practicals you have done over the course
The images may help you!
Variables
Write down a definition of the following variables
give examples
TASK
Other key words
Validity
Accuracy
Precision
Anomalous
Correlation
Average
Concordant readings
Tests for Glucose, Starch, Lipids and Protein
Illustrate how enzyme activity can be affected by changes in temperature (TRIPLE pH)
Demonstrate Diffusion and Osmosis
Investigate Photosynthesis
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
Independent Variable
Dependent variable
Control Variable
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

Questions
Title
What is your experiment called?
Aim
What are you investigating?
state the effect of the independent variable on the dependent variable
Hypothesis
What is the scientific theory?
Equipment list:
–what will you use to carry out the experiment?
State the variables:
Independent
Dependent
Control


Practicals
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)

Method
Describe how you will carry out the experiment.
Point form
Diagram
How will you ensure it is reliable and valid?
Results
How will you display your results?
Conclusion
What should the results show?
Evaluation
How would you prove the experiment was reliable/valid?
Full transcript