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Lesson 74 of 84 · Earth's History
ExperimentErosion: Moving Earth's Surface (Part 3)
What You'll Learn
Wind forms when the sun heats Earth's surface unevenly, creating pressure differences. Air moves from high pressure to low pressure areas, and Earth's rotation curves the wind paths.
Key Words
- earthquake
- volcano
Materials Needed
- thermometer
- rain gauge
- cotton balls
- food coloring
- clear container
- rocks
Safety First
- Protect your work surface with newspaper or plastic.
- Adult supervision recommended.
- Do not taste any materials.
Steps
Step 1 — Read
Review the background information on Earth's History before starting.
Step 2 — Do
Build a working model of a volcano using baking soda and vinegar. Observe the eruption and explain what causes real volcanic eruptions.
Step 3 — Observe
Look for patterns in your observations.
Step 4 — Record
Make a graph or chart showing your results.
Check Your Understanding
Question 1
1 of 3What is erosion?