World Biomes
According to national Geographic there are at least five types of major biomes on earth: aquatic, grassland, forest, desert, and tundra. Each biome has its own subtypes.
We'll focus on aquatic and forest biomes
Aquatic
Aquatic biomes
consist of bodies of water
Forest
Forest Biomes have many trees.
You can find more information about biomes here:
NASA's Earth Observatory