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Chapter 2 lesson 3
| 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 reign that o 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 the rain forest |
| understory | a layer of shorter trees and vines that grow in shade in a forest canopy |
| grassland | an area populated mostly by grasses and other non woody plants that gets 25 to 75 cm of rain each year |
| savanna | a grassland located close to the equator that may include shrubs and small trees and receives and as much as 120 cm of rain per year |
| deciduous tree | a tree that sheds its leaves during a particular season and grows new ones each year. |
| boreal forest | dense forest of evergreens located in the upper regions of the northern hemisphere |
| coniferous tree | a tree that produces its seeds in cones and that has needle-shaped leaves coated in a waxy substance to reproduce water loss |
| tundra | an extreme cold, dry biome climate region characteristics by short cool summers and bitterly cold winters |
| pemafrost | Permanently frozen solid found in the tundra biome climate region |
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medershannon
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