30
Lesson 30 of 84 · Earth's History
ExperimentLandforms: 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
- precipitation
- water cycle
Materials Needed
- water
- plastic tray
- magnifying glass
- newspaper
Safety First
- Dispose of materials properly after the experiment.
- Handle glass items carefully to avoid breakage.
- Do not mix unknown chemicals together.
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 3What is the ozone layer?