22
Lesson 22 of 84 · Waves
ExperimentTesting and Improving Prototypes
What You'll Learn
The scientific method is a systematic approach to investigating questions. It involves making observations, forming hypotheses, conducting experiments, analyzing data, and drawing conclusions.
Key Words
- record
- hypothesis
Materials Needed
- ruler
- markers
- popsicle sticks
Safety First
- Do not taste any materials.
- Wear safety goggles when mixing liquids.
- Wash hands after handling materials.
Steps
Step 1 — Read
Look at the vocabulary words and write a definition for each in your own words.
Step 2 — Do
Design an experiment to test a hypothesis. Identify your independent variable, dependent variable, and controls. Run the experiment and present results.
Step 3 — Observe
Observe what happens and describe it in detail.
Step 4 — Record
Record your observations in your science journal with measurements and descriptions.
Check Your Understanding
Question 1
1 of 3What is a hypothesis?