Geography
The largest continent
Asia
Very cold climate found near the poles
Polar
The driest biome on Earth
Desert
Trees that produce cones instead of flowers
Conifers
The variety of life in one area
Biodiversity
Imaginary line dividing North and South hemispheres
Equator
The total amount of rain that falls in a year
Precipitation
The biome covering much of northern Canada and Siberia
Taiga
Forest made mostly of broad-leaved trees in temperate biome
Deciduous
The specific place where a single species lives
Habitat
The imaginary line at 0° longitude
Prime or Greenwich Meridian
Frozen ground that stays solid all year
Permafrost
The biome with scattered trees and seasonal rain
Savannah
Treeless plain dominated by grasses
Grassland
A large ecological region with similar climate and living species
Biome
The parallels at 23.5° South and North
Tropics
A long period without rain
Drought
A large grassland in Eurasia
Steppe
Vegetation layer below the canopy
Understory
Natural burning process in grasslands
Wildfire
Zone between Arctic Circle and Tropic of Cancer, or Antarctic Circle and Tropic of Capricorn
Temperate
A seasonal wind that brings heavy rain along the equator.
Monsoon
A grassland with almost no trees in North America
Prairie
Low-growing simbiotic Arctic organism
Lichen
Living and non-living components of an ecosystem
Biotic and Abiotic