3
Lesson 3 of 84 · Light
ExperimentHow to Do an Experiment
What You'll Learn
Recording your observations means writing down or drawing what you notice during an experiment.
Key Words
- question
- test
Materials Needed
- cardboard
- tape
- scissors
- straws
- paper clips
Safety First
- Do not look directly at the sun or bright lights.
- Clean up spills immediately to prevent slipping.
- Use materials only as directed in the experiment.
Steps
Step 1 — Read
Read the introduction. What is this lesson about?
Step 2 — Do
Build a tower from spaghetti and marshmallows. Measure how tall you can make it.
Step 3 — Observe
Look for something that changed. What is it?
Step 4 — Record
Circle the correct answer on your worksheet.
Check Your Understanding
Question 1
1 of 3Why do we record what happens in experiments?