Science - Experiments - variables

Question 0

Define ‘independent variable’.

Answer 0

The variable that the scientist changes and then observes the effect.
An experiment should only have 1 independent variable otherwise you can’t be sure which independent variable change caused the effect.

Question 1

Define ‘control variable’.

Answer 1

The control variable remains the same to keep the experiment fair.
An experiment can have more than 1 controlled variable.

Question 2

Define ‘dependent variable’.

Answer 2

The dependent variable is where change will be observed by the scientist. The scientist changes the independent variable to see if it causes any change in the dependent variable.