Why Biomes Sit Where They Do
Rainforest, desert, grassland and tundra are not scattered at random: they follow bands of temperature and rainfall set by how the atmosphere circulates. Once you know the pattern, you can predict roughly what grows at a given latitude before looking.
What a learner can do afterwards
- Explain why deserts cluster around thirty degrees north and south
- Match three biomes to their temperature and rainfall conditions
- Give one place where the simple latitude rule fails and say what overrides it
1 · Read
Rainforest, desert, grassland, and tundra are not scattered at random. They follow bands of heat and rain around the planet. Tropical forest hugs the wet equator, deserts ring the dry lands near thirty degrees north and south, and forest yields to tundra toward the poles. Learn each biome as a pairing of temperature plus rainfall, and you can guess the vegetation at a latitude before you look.
The bands come from how air moves. Air rises at the equator, drops its rain there, then sinks back down near thirty degrees as dry air. Sinking air means deserts cluster around those latitudes instead of at the hottest equator.
Test yourself by matching three biomes to their conditions. Rainforest means warm and soaked all year. Desert means hot and dry. Tundra means cold with little rain. Then hunt the rule breaker: a place where the latitude guess fails. Mountains, ocean currents, and rain shadows can overrule latitude and flip the local climate entirely.
Predict in two moves. First guess the biome from latitude alone. Then ask what local feature could flip it: a mountain lifting wet air, a cold current chilling the coast, or high elevation cooling the tropics.
Circulation sets temperature and rainfall bands, and local features sometimes override them.
More to read
44.3 Terrestrial Biomes
Land biomes form bands around the planet because heat and rain do. Tropical forest hugs the wet equator, deserts ring the dry subtropics near thirty degrees, and forest gives way to tundra toward the poles. Learn each biome as a pairing of temperature plus rainfall, then test yourself by placing three of them on a blank map.
44.5 Climate and the Effects of Global Climate Change
Biome borders are not fixed, because climate sets them and climate is shifting. As heat and rainfall patterns move, deserts creep, forests stress, and species must move, adapt, or fade. Places that already sit near a limit feel it first. Reading the change starts with knowing what each biome needs, then spotting where those needs stop being met.
20.3 Terrestrial Biomes
A second tour of land biomes locks in the pattern: same planet, same bands, new details. Compare deserts, grasslands, and forests side by side on rainfall and temperature. Notice how life in each place solves the same problems with different tricks, from deep roots to water storing stems.
Key points: Terrestrial biomes
This short recap pins down the land biomes in plain form: where each sits and what heat and water it gets. Use it to check your matches before you look at exceptions. Then hunt the rule breaker, a place where mountains, currents, or elevation override latitude.
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2 · Watch
En anglaisTake it off screen
Where it sits
Learn first
Optional connections
This opens up
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.