The Earth is a large biome. There are lots of different environments with different temperature, moisture, light, and so on. Each of the areas or habitats has different animals and plants living in it. This makes complex communities. Each community of plants and animals within each region or habitat is called a biome.
Biomes are ecosystems where several habitats intersect. There are smaller biomes, which include grasslands, desert, aquatic, tundra, and rainforest.
The biomes on Earth have changed over the course of history. Some of the change comes because of man altering the habitat. Because of this, we need to be more aware of ways to conserve biomes in our community.
Biomes are naturally occurring, but you can create a controlled biome. The Biosphere 2 is a famous manmade biome. Try making your own biome and observing what happens.