Variables resources

Students indicate for each of six different variables those that need to be kept the same for an investigation about dissolving different types of sugar.

Task: Identify the variables for testing how fresh water and salt water affect rusting. Assessment focus: planning a fair test.

Students outline four ways of improving a given plan for an investigation to make it a fair test.

Students decide on the variables that will make an experiment about boiling water a fair test. Assessment focus: Recognising multiple variables.

From a diagram of an experimental set up, students answer questions based on fair testing principles. Questions cover the control of variables, and measurement of results.

Task: Answer two questions about setting up a fair test and another about insulating houses. Assessment focus: controlling variables.

Task: Identify which variables should be kept the same to compare reaction times. Assessment focus: control of variables.