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Lesson 66 of 84 · Engineering and Design
ExperimentWhat Scientists Do (Part 4)
What You'll Learn
A prediction is a guess about what will happen. Good scientists make predictions before testing.
Key Words
- measure
- compare
- record
Materials Needed
- rubber bands
- string
- cups
- aluminum foil
Safety First
- Do not taste any materials.
- Wear safety goggles when mixing liquids.
- Wash hands after handling materials.
Steps
Step 1 — Read
Read and learn: A prediction is a guess about what will happen. Good scientists make predictions before testing.
Step 2 — Do
Measure using your ruler or measuring cup.
Step 3 — Observe
Watch carefully. What happens?
Step 4 — Record
Draw and write about what you learned.
Check Your Understanding
Question 1
1 of 3What does 'observe' mean?