Fair Tests: Changing One Thing

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.

Keep small objects away from young children.
Work in a well-ventilated area when using vinegar or other strong-smelling substances.

Step 1 — Read

Look at the new words. Can you say each one?

Step 2 — Do

Design a boat from foil that can hold the most pennies without sinking.

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?