Hypothesis and prediction

A testable statement about what you expect, and why.

What it is

A hypothesis is a testable proposal about the relationship between variables. A prediction states what will happen in a specific experiment, ideally with a reason based on scientific knowledge.

Where it applies

All three sciences, psychology and geography fieldwork.

How it works

A hypothesis must be testable and falsifiable — capable of being shown wrong. 'Plants grow better with music' is testable; 'plants prefer music' is not.

A prediction with a scientific reason scores more than one without.

How to use it in your work

Include the reason. "The rate will increase because higher temperature gives particles more kinetic energy, so more frequent successful collisions" is a full-mark prediction.

Name the independent and dependent variables in the hypothesis.

In psychology, write it as a proper directional or non-directional hypothesis with operationalised variables.

Where to get help

Your teacher and your board's specification. Bitesize for worked examples, and the subject song for the topic list.