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Lesson 17 of 84 · Engineering and Design
ExperimentFair 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.
Key Words
- problem
- solution
Materials Needed
- rubber bands
- string
- cups
- aluminum foil
- ruler
Safety First
- Do not look directly at the sun or bright lights.
- Clean up spills immediately to prevent slipping.
Steps
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.
Check Your Understanding
Question 1
1 of 3What does 'predict' mean?