Std 15.

Created by ellism826 

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acid rain

rain containing sulfuric acids

aquatic biomes

underwater ecosystems *

aphotic zone

permanently dark layer of the oceans below the photic zone

arid

having insufficient rainfall to support agriculture *

benthos

organisms that live attached to or near the ocean floor

biomes

group of ecosystems that have the same climate and dominant communities

biosphere

part of earth in which life exists including land, water, and air or atmosphere

clear cutting

cutting all the trees in an area down at once *

cold desert

A desert that is low in temperature

coniferous forest

forest populated by cone-bearing evergreen trees

conservation

wise management of natural resources, including the preservation of habitats and wildlife

deciduous forest

a type of forest characterized by trees that seasonally shed their leaves

deforestation

destruction of forests

desert

dry land with little or no vegetation

estuary

wetlands formed where rivers meet the ocean

glacial lake

A lake that gets much or all of its water from the melting of glacier ice.

grassland

a large area of land covered with grasses.

groundwater

water that fills the cracks and spaces in underground soil and rock layers

ozone

atmosphereic layer in which ozone gas is relatively concentrated

permafrost

layer of permanently frozen subsoil in the tundra

photic zone

well-lit upper layer of the oceans

rainforest

a forest with heavy annual rainfall

semi-arid

very dry with little rainfall

surface runoff

Water flowing off the land into bodies of surface water. See reliable runoff.

taiga

biome in which the winters are cold but summer are mild enough to allow the ground to thaw

terrestrial biomes

Biomes on land (forests, taiga, tundra, etc.)

tundra

a vast treeless plain in the arctic regions between the ice cap and the tree line

wetlands

ecosystem in which water either covers the soil or is present at or near the surface of the soil for at least part of the year

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