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Chapter 2 Science
Lesson 3 Biomes
Term | Definition |
---|---|
Biome | a group of ecosystems with similar climates and organisms |
Climate | the average annual conditions of temperature, precipitation, winds, and clouds in an area |
Desert | a dry region that on average receives less than 25 centimeters of precipitation per year |
Rain Forest | a forest that receives at least 2 meters of rain per year, mostly occurring in the tropical wet climate zone |
Emergent Layer | the tallest layer of the rain forest that receives the most sunlight |
Canopy | a leafy roof formed by tall trees in a rain forest |
Understory | a layer of shorter trees and vines that grows in the shade of a forest canopy |
Grassland | an area populated mostly by grasses and other nonwoody plants that gets 25-75 centimeters of rain each year |
Savanna | a grassland located close to the equator that may include shrubs and small trees and receives as much as 120 centimeters of rain per year |
Deciduous Tree | a tree that sheds its leaves during a particular season and grows new ones each year |
Tundra | an extremely cold, dry biome climate region characterized by short, cool summers and bitterly cold winters |
permanently frozen soil found in the tundra biome climate region |