Terrestrial biomes are defined by temperature and precipitation.
- Tropical forest
thrives in high temperatures and abundant rain.
exists in hot and dry areas.
is dominated by grass in tropical areas with moderate rainfall.
is dominated by grass in temperate areas with moderate rainfall.
- Deciduous forest
occurs in temperate areas with sufficient rain to support trees; a cold season causes trees to shed leaves.
(known as Mediterranean in Europe) is found in savanna-like coastal areas where winter rains support
- Coniferous forest
exists in cold areas that receive enough precipitation to support evergreen trees.
is found in colder areas where the soil below 1 meter is permanently frozen into permafrost,
and only short vegetation can grow.
- Polar ice
is found near the poles with almost no precipitation.
Freshwater is scarce; life is limited to coastal areas and its oxygen-rich cold waters.