Session 20

Click on the session 20 button and write the answers in your revision exercise book. If you are unsure of the facts in the topic go through the knowledge test questions and then mark it using the knowledge test answers.

Required Practical

Click on the required practical button. Write details about the practical. Including : Method, Variables, Equipment, Diagram, Results Table, How you use your results and a Conclusion.

Optional - Above and Beyond

If you want to really test yourself complete the shorter questions below to show real understanding.