Revision

Overview

This lesson is for pulling the practical-skills topic together before the test. The aim is to check that you can use the skills in mixed questions, not just remember them lesson by lesson.

What You Need to Know

• You should be able to use key terms such as accuracy, precision, reliability, range, anomaly, random error, and systematic error.
• You should be able to write a clear method with equipment, variables, repeats, and safe measurement steps.
• You should be able to plot a graph, choose a scale, draw a best-fit line, describe the trend, and calculate a gradient.
• You should be able to write a conclusion using evidence from results.

How to Work Through It

1. Start with quick retrieval of the key practical terms.
2. Work through mixed questions on planning, graphing, conclusions, and errors.
3. Mark or check your answers carefully and correct weak explanations.
4. Finish by writing a short revision list for anything that still feels insecure.

Check Your Understanding

• Can you explain the difference between accuracy, precision, and reliability?
• Can you write a method that another student could follow?
• Can you calculate a gradient from a graph?
• Can you suggest an improvement that matches a specific error?

Common Mistakes

• Revising definitions but not practising how to use them in questions.
• Forgetting to include units, repeats, or controlled variables in method answers.
• Giving vague improvements such as “make it more accurate” without saying how.

Next Steps

• Use the revision slides to practise the question types that caused the most difficulty.
• Prepare for the test by focusing on your weakest practical skill rather than rereading everything equally.