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