title: Likelihood Scale

Hazards are only a problem if they have a chance of happening. Mathematicians call the chance of a particular event happening its probability.

Likelihood scale

A likelihood scale gives an indication of how often an outcome is likely to happen.

Drag and drop the outcomes to make your own scale.

Never happen


Not likely


Equal chance

yes or no



Definitely happen


Drag the objects on left to the correct targets on the right.

To be more precise, a Probability scale can be used. Click here to see one.

An elephant can fly by flapping its ears.

Iceland will win a football World Cup.

The chance of being born a boy or a girl.

If I do not revise I will fail my exams.

The sun will come up in the morning.