Skip to main content
The Null

Chapter 3: The Great Guess

The Null

"Sometimes, nothing happens. That is okay too!"

A cute ghost labeled "Null Hypothesis" (it means nothing changed).

About this page

Meet the friendliest ghost in science. This little spirit stands for the null hypothesis, the possibility that nothing changes at all when you run your test. That sounds like a letdown, but the book makes it huggable on purpose. Learning that no change is a real, useful answer protects kids from thinking an experiment failed just because nothing dramatic happened. Finding out that something makes no difference still teaches you something true. It is one of the deeper ideas tucked inside this research coloring book for kids, delivered by a ghost too cute to fear.

Talk about it while you color

  • Why do you think the ghost looks friendly instead of spooky?
  • Can you remember a time you tried something and nothing happened? What did you do next?
  • If the ghost could talk, what do you think it would tell the Squad?