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28 terms

Std 15.

STUDY
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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