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Unformatted text preview: 03/10/2007 00:59:00 ← How old is the earth? 4 ½ billion years old life on planet has always been changing suttle changes with sun/earth relationship can have dramatic changes earth sits on a axis (parts will be exposed while others are not. • distance matters (away from sun) rays of sun must pass through atm made up of oxygen, water, and carbon dioxide all that regulate the temperature of the planet greenhouse gases. Wavelengths measured in cm water (more capacity to absorb energy) land less capacity snow and ice (deflected back into space)—reflected back longer wavelengths. • earth is a system of integrated parts. • climatic system= Earth system ← What is the outermost layer of the earth called? Middle? Innermost? atmosphere, crust, mantle, outer core, inner core. ← What are the different types of plate tectonic boundaries? • mantle sphere is semimoultin not hard like crust crust is floating on semimoultin sphere. Crust is broken into plates which are separated into ridges. (mountain at edge of ocean) • convection heat added to a body will cause body to expand become buoyant and then become less dense then mantle around it and rises and begins to cool as it cools it will become more dense again and sinks rises and sinks again known as convection. • pacific crust is diving under continental crust. ← Draw a profile showing the vertical structure of the atmosphere on the basis of temperature and pressure • atm into different layers pg 22 • only two lowest are critical with climate change o troposphere which extends from 8-18 kil both the layer which we live and which most of earths weather happens 80% of the gases that form earths atm are contained here. cool--. rising and falling of air molecules. temperature decreases with height o Stratosphere extending up 50 kil. only largest storms penetrate stratosphere contains small amounts of oxygen, and ozone which block ultraviolet rays arriving from the sun. --. very good traveler of heat and therefore it heats again atm begins to warm again as you go higher and higher into atm. increases with height o mesosphere 50-80 decreases with height o Thermosphere above 80 increases with height. • atm pressure is highest at the surface--. atm pressure force of gravity on the mass of molecules that make up the atm. • gravity acting on the mass that makes up the atm is causing this downward force. and where you find the greatest number of molecules you find the force....
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- Fall '07