People and Earth's Ecosystem

4. A steep, often narrow formation carved by erosion, revealing Earth's layers.
5. A place altered by humans but still retains some natural elements.
9. The system that includes all living organisms, from plants to animals to microorganisms.
11. The thin outer shell of Earth, supporting life and human activity.
12. High landforms that can stand as barriers to weather patterns or form natural borders.
15. All Earth's water — including lakes, rivers, and glaciers — forms part of this system.
16. This atmospheric layer contains the ozone, protecting us from harmful ultraviolet rays.

1. This feature can explode with lava, ash, and gases, reshaping the surrounding landscape.
2. Areas largely untouched by human development, like forests or wetlands.
3. A thick, rocky layer beneath the crust, responsible for tectonic movement.
6. Entirely constructed by humans — often features cities, roads, and industrial areas.
7. The lowest atmospheric layer, where weather occurs and we live.
8. This part of the Earth moves slowly but shapes the continents and ocean floors.
10. The central, fiery region of the Earth that generates immense heat.
13. The layer of air above the weather zone — it protects us from too much sun.
14. The life-sustaining layer of gases that envelops Earth.