Module 1 Chapter 1 Practical Skills Assessed in a Written Examination

Question 1

What is the minimum number of readings you should take for an independent variable?

Answer 1

You should take at least six readings per repeat.

Question 2

What is the minimum number of repeats you should carry out for each of your experiments?

Answer 2

You should test each reading at least three times.

Question 3

What are control variables?

Answer 3

Variables that remain the same (constant) throughout your investigation.

Question 4

What is an independent variable?

Answer 4

The variable that you change over the course of the experiment, typically in regular intervals. There should only be one independent variable in an experiment.

Question 5

What is a dependent variable?

Answer 5

The variable that is affected by the independent variable and the one that you measure to draw a conclusion. There should only be one dependent variable in an experiment.