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