the earth ’ s atmosphere
DESCRIPTION
The Earth ’ s Atmosphere. re-teaching assignment. The Earth is surrounded by a “blanket” of air called the atmosphere. http://www.lunaroutpost.com/gallery/earth/pages/earth_full_hires%20copy.htm. The Earth ’ s Atmosphere is a mixture of gases:. - PowerPoint PPT PresentationTRANSCRIPT
The Earth’s Atmosphere
re-teaching assignment
The Earth is surrounded by a “blanket” of air called the atmosphere.
http://www.lunaroutpost.com/gallery/earth/pages/earth_full_hires%20copy.htm
The Earth’s Atmosphere is a mixture of gases:
http://webusers.astro.umn.edu/~john/Ast1001/air/atmos-compos.jpg
What are some natural events that afffect the earth’s atmosphere?Forest fires
Volcanic ash
http://upload.wikimedia.org/wikipedia/en/thumb/4/49/Wildfire3.jpg/240px-Wildfire3.jpg
http://www.windows2universe.org/earth/interior/ash.html
What keeps the atmosphere so close to the earth???GRAVITY!
http://www.cs.dartmouth.edu/farid/sciencekids/gravity2.jpg
Although it seems thin, the atmosphere is ~500 miles thick!
Even the International Space Station flies within the Earth’s atmosphere!
http://nssdc.gsfc.nasa.gov/image/spacecraft/iss.jpg
The atmosphere has five basic layers.
http://www.theozonehole.com/atmosphere.gif
THE LAYERS ARE
DETERMINED BY CHANGES
IN TEMPERATURE
http://www.windows2universe.org/earth/Atmosphere/layers_activity_print.html
Temperatures in the AtmosphereWhy does the graph zigzag back and forth?
We live in the lowest layer, the troposphere.
http://www.fas.org/irp/imint/docs/rst/Sect14/atmosphere.jpg
Most of Earth’s weather takes place in the troposphere.
http://images.worldofstock.com/slides/TRA1094.jpg
About ten miles up is the Tropo-pause, where the troposphere
ends.
Most jet planes can fly close to or just above the tropopause.
Between each atmospheric layer, we have a “pause” or break. These are arbitrary lines- and not real breaks.
http://www.epa.gov/apti/course422/images/fig-1.gif
After the troposphere comes the stratosphere.
http://www.greenfacts.org/glossary/images/stratosphere-troposphere.jpg
High winds in the statosphere are called the Jet Stream.
www.accuweather.com/www/nyc/jetstream.gif
The Ozone layer (O3) can be found in the stratosphere. It protects us from harmful UV radiation from the sun.
http://veimages.gsfc.nasa.gov/138/ozone_hole_large.jpghttp://www.okiu.ac.jp/Language/contest/02/12/ozone.gif
Weather Balloons explore the stratosphere.
http://www.discover.uottawa.ca/~aelsawah/GNG1101/LAB2_files/image004.jpg
http://www.ssec.wisc.edu/sose/wvi/images/scen3.jpg
In the Stratosphere… spy planes!
http://retrothing.typepad.com/photos/uncategorized/2007/12/21/sr71blackbird.jpg
Believe it or not, 99% of all the gases that surround the earth are found in the first two layers we’ve seen so far.
Mesosphere is the layer In the Middle!
Mesosphere- where the meteors burn.
http://www.meteorites.homepage.t-online.de/jpg/cerny.jpg
hektor.umcs.lublin.pl/.../collection/nantan.jpg
Millions of meteors burn up in our atmosphere each year. If they hit the ground, they are called a meteorite.
http://www.montaukobservatory.com/Observer/meteor-nasa.gifPerseid Meteor Shower
If it weren’t for the atmosphere…
http://woodshole.er.usgs.gov/epubs/bolide/images/meteorcrater.jpg
(Barringer Crater) in Arizona, some 38 miles east of Flagstaff,
http://www.worth1000.com/entries/111000/111117fKmj_w.jpg
Meteor Impact in the Yucatan Peninsula, Mexico. This possibly killed off the dinosaurs.
Smaller impacts do occur but are rare.
http://static.howstuffworks.com/gif/peru-meteor-1.jpg
Peru, South America
http://apod.nasa.gov/apod/image/0611/peekskill_thomas.jpg
Peeksgill, New York
THERMOSPHERE IS MADE OF THE IONOSPHERE & THE EXOSPHERE.
http
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Ionosphere- Where solar particles are ionized in the upper atmosphere.
http
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Ionosphere reflects radio waves
apollo.lsc.vsc.edu/.../ionosphere_layers.psd.gif
The Aurora- Borealis (N)/Austrialis (S)
http://shelp.chess.cornell.edu/multimedia/aurora/09_07_02/35mmlights2_9_7_02.jpg
The Exosphere is
the outermost layer. After
that the area we call “outer space” begins.
atschool.eduweb.co.uk/.../gfx/exosphere.jpg
Temperatures in the Exosphere
Things found in the Exosphere.
http://nssdc.gsfc.nasa.gov/image/spacecraft/iss.jpg
http://www.boeing.com/defense-space/space/hsfe_shuttle/images/nasa-sys_shuttle_sts071-741_200X250.jpg
Satellites orbit Earth in the exosphere.
http://www.wmo.ch/web/www/images/GOS/Figure%20II-10%20Satellites.jpg
If it weren’t for the atmosphere, our earth
would look like…
http
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The moon, with thousands of impact craters.
Because the moon has less gravity and much higher temperatures than the earth, its gases get
“excited” or very energetic, and are lost to space.
http :// ww
w.abc.net .au/scie nce/features/lu naecli pse2007/
What is Air Pressure?Air pressure is the weight of the atmosphere pressing down on an area of the earth.
http://dogfoose.com/infotoons/
Pressure changes with altitude – the higher altitude, the lower the air pressure.
htt://images.google.com/imgres?imgurl=http://www.physicalgeography.net/fundamentals/images/pressure_altitude.jpg&imgrefurl=http://www.physicalgeography.net/fundamentals/7d.html&usg=__2bKRE46nD8PHInoiyOVgt1Lv2ok=&h=580&w=491&sz=59&hl=en&start=5&tbnid=qFc-E7U_YbFDyM:&tbnh=134&tbnw=113&prev=/images%3Fq%3Dair%2Bpressure%26gbv%3D2%26hl%3Den%26safe%3Dactivep
Credit:Mr. Fontaine, Mercer Middle School