Year 7 · Science · Working safely in the lab · Lesson 2
Variables and fair tests
Independent, dependent and control variables, fair tests, predictions, repeating to find a mean, anomalous results and writing conclusions with data.
17-minute video lesson
Teaching, worked examples and 20 practice questions solved step by step.
Watch free for a monthWhat your child will learn
- Identify independent, dependent and control variables
- Explain a fair test
- Calculate a mean
- Write a conclusion using data
The method
- Question + prediction.
- Variables.
- Repeat + mean.
- Conclusion.
Key words: independent variable, dependent variable, control variable, fair test, mean, anomalous.
Worked examples
The first three practice questions from the lesson, with every step.
Question 1
What is the independent variable?
- Step 1: Change
Answer: the variable you change
Question 2
What is the dependent variable?
- Step 1: Measure
Answer: the variable you measure
Question 3
What is a control variable?
- Step 1: Same
Answer: a variable you keep the same