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Lesson 37 of 84 · Engineering and Design
ExperimentFair Tests: Changing One Thing (Part 2)
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
- try again
Materials Needed
- string
- cups
- aluminum foil
Safety First
- Clean up spills immediately to prevent slipping.
Steps
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.
Check Your Understanding
Question 1
1 of 3What does 'predict' mean?