# Hypothesis

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"Hypothesis"

```					                Hypothesis
The definitive guide on how to write a hypothesis
Casa Grande Middle School
G.Baker
What is a hypothesis?
 A hypothesis is an educated guess or
 A hypothesis is testable; an
experimental investigation can be
done based on the hypothesis.
 Not every question can be
The hypothesis is the key. If you
can state your question as a
testable hypothesis, then you can
use the scientific method to obtain
an answer, which means you can
do it as a science fair project.

 What is your independent variable?
 What are you changing?
 It should be only one thing.
 What is your dependent variable?
 What are you measuring?
Hypothesis Format
   Use an “If…, Then….” statement.
   An If, Then statement shows cause and effect.
   In other words, what effect does the independent
variable have on the dependent variable? Or what
does the independent variable cause the dependent
variable to do?
   Write a research hypothesis using this format:
 IF the independent variable changes, THEN the
dependent variable will change.
 Use the words
 AFFECT – verb – to act upon, to change or to
cause a change
 EFFECT – noun – result; consequence
 When you affect something, you produce an
effect on it.
Let’s Practice

 On a separate piece of paper, write your name.
 On the top line, create a title for your science
fair topic.
 Identify the independent variable
 Identify the dependent variable
 Now we are ready to write our hypothesis.
 If (I change this, independent variable), then (this
will happen, dependent variable.)

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