Landforms: Mountains, Valleys, Plains

What You'll Learn

Landslides occur when slopes become unstable due to heavy rain, earthquakes, or human activity. Gravity pulls loose rock and soil downhill, sometimes with devastating speed.

Key Words

water cycle
climate

Materials Needed

cotton balls
food coloring
clear container

Safety First

Keep small objects away from young children.

Steps

Step 1 — Read

Read and learn: Landslides occur when slopes become unstable due to heavy rain, earthquakes, or human activity. Gravity pulls loose rock and soil downhill, sometimes with devastating speed.

Step 2 — Do

Measure and record your data in a table.

Step 3 — Observe

Watch carefully for any changes and note the time.

Step 4 — Record

Create a data table to organize your measurements.

Check Your Understanding

Question 1

1 of 3

What is the ozone layer?