Fair Tests: Changing One Thing (Part 3)

What You'll Learn

A fair test changes only one thing. If you change two things, you will not know which one made the difference.

Step 1 — Read

Read and learn: A fair test changes only one thing. If you change two things, you will not know which one made the difference.

Step 2 — Do

Sort, group, or arrange the items as shown.

Step 3 — Observe

Use your senses to describe what you notice.

Step 4 — Record

Write 1-2 sentences about what happened.

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What does 'predict' mean?