2
Ecosystems
4
Ecosystems Level 4
4
Montane Forest
4
Tropical Rainforest
4
Steppe
2
Treeless Plains! Steppe
4
Polar
2
Four Seasons! Deciduous Forest
4
Taiga
4
Deciduous Forest
2
Hot and Dry! Desert
4
Savanna
2
Warm Grasslands! Savanna
2
Water Everywhere! Aquatic
2
Snow and Ice! Polar
2
Hot and Wet! Tropical Rainforest
4
Tundra
2
Evergreen Forests! Taiga
2
Frozen Ground! Tundra
4
Aquatic
3
Lakes of the World
4
Desert