Across
- 3. an area of tall trees and a high amount of rainfall.
- 6. a large aquatic ecosystem that includes both saltwater and freshwater habitats
- 7. polar region is located at the northernmost part of Earth
- 8. a biological community of interacting organisms and their physical environment
- 9. treeless regions found in the Arctic and on the tops of mountains
Down
- 1. landforms that rise prominently above the surrounding landscape
- 2. an area of land that receives no more than 25 centimeters (10 inches) of precipitation a year
- 4. is found in mountain regions worldwide, including the Andes, Alps, and Rocky Mountains
- 5. made up of large open areas of grasses