What Does the Atmosphere Do? Crash Course Geography #6

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What Does the Atmosphere Do? Crash Course Geography #6



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Much like a cell membrane, our atmosphere forms a protective boundary between outer space and the biosphere that allows for all life to exist on Earth’s surface. Today, we’re going to talk about its composition and layers (the troposphere, stratosphere, mesosphere, and thermosphere), follow the path of a sunbeam of light as it travels through space and (potentially) reaches Earth’s surface, and discuss how the greenhouse effect can be both a good and bad thing.

Content Standard(s):
Social Studies
SS2010 (2010)
Grade: 7
3 ) Compare geographic patterns in the environment that result from processes within the atmosphere, biosphere, lithosphere, and hydrosphere of Earth's physical systems.

•  Comparing Earth-Sun relationships regarding seasons, fall hurricanes, monsoon rainfalls, and tornadoes
•  Explaining processes that shape the physical environment, including long-range effects of extreme weather phenomena
Examples: processes—plate tectonics, glaciers, ocean and atmospheric circulation, El Niño

long-range effects—erosion on agriculture, typhoons on coastal ecosystems

•  Describing characteristics and physical processes that influence the spatial distribution of ecosystems and biomes on Earth's surface
•  Comparing how ecosystems vary from place to place and over time
Examples: place to place—differences in soil, climate, and topography

over time—alteration or destruction of natural habitats due to effects of floods and forest fires, reduction of species diversity due to loss of natural habitats, reduction of wetlands due to replacement by farms, reduction of forest and farmland due to replacement by housing developments, reduction of previously cleared land due to reforestation efforts

•  Comparing geographic issues in different regions that result from human and natural processes
Examples: human—increase or decrease in population, land-use change in tropical forests

natural—hurricanes, tsunamis, tornadoes, floods

Tags: atmosphere, biosphere, mesosphere, stratosphere, thermosphere, troposphere
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Author: Ginger Boyd