Crossword puzzle

1. The process where trees absorb carbon dioxide, reducing greenhouse gas levels.
4. This event occurs when molten rock erupts from the lithosphere, affecting air and water.
6. The slow movement of water shaping valleys and carrying sediments to oceans.
7. The sphere that includes all living organisms on Earth.
9. The rigid outermost layer of the Earth that forms landmasses.
12. The type of environment that has been altered by human activities, such as cities and farms.
13. The type of plate boundary where mountains like the Himalayas form due to collision.
14. The innermost layer of Earth, composed mainly of iron and nickel.

2. A natural process where water, wind, or ice wears away landforms like canyons.
3. The layer of the atmosphere where weather and clouds form.
5. The sphere that includes rivers, lakes, and oceans.
8. This layer of the atmosphere contains the ozone layer, which protects life from harmful UV rays.
10. A deep valley carved by a river over millions of years.
11. The movement of Earth's plates that leads to earthquakes and volcanoes.