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Lesson 4 of 84 · Earth's History
ExperimentErosion: Moving Earth's Surface
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
- evaporation
- condensation
Materials Needed
- spray bottle
- cups
- thermometer
- rain gauge
- cotton balls
- food coloring
Safety First
- Tie back long hair before starting the experiment.
- Protect your work surface with newspaper or plastic.
- Adult supervision recommended.
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?