Erosion: 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

evaporation
condensation
precipitation

Materials Needed

food coloring
clear container
rocks

Safety First

Work in a well-ventilated area when using vinegar or other strong-smelling substances.

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 3

What is erosion?