Transcript WARM air - Verona Public Schools

Meteorology
Seventh Grade Science ~
Mrs. Thomas
A
HUGE mass of air
can have the
characteristics of the
area over which it
occurs.
Moist
Air
Cool or
COLD Air
Dry
Air
Warm or
HOT Air
http://disney-clipart.com/mickey-mouse/mickey-mouse/mickey-mouse20.php
OBSERVE + DISCUSS
earth.usc.edu/.../Catalina/WeatherPatterns.html
When two air masses of
different temperatures meet,
a BOUNDARY is formed
between them, called a front.
http://disney-clipart.com/Ratatouille/Gusteau.php
http://i-love-disney.com/disney-gallery/displayimage.php?album=147&pos=7
A front is a zone of conflict
between opposing armies.
COOL
MOIST
air
HOT
DRY
air
COOL
MOIST
air
HOT
DRY
air
http://i-love-disney.com/disney-gallery/displayimage.php?album=147&pos=9
http://disney-clipart.com/Disney-Character-Clipart.php
http://www.physicalgeography.net/fundamentals/images/coldfront.GIF
• cold air pushes warmer air
• warmer air is forced to rise
• as boundaries meet, water condenses + precipitation forms
• Thunderstorms CAN result
• cumulus + cumulonimbus clouds
• the temperature DROPS after the front has passed
http://disney-clipart.com/Disney-Character-Clipart.php
REMEMBER:
COLD or COOL air is heavier and more dense than warm air.
Cooler air has more force than warmer air.
www.aos.wisc.edu/~aalopez/aos101/wk13.html
COLD fronts
bring choppy
gusty winds.
www.camelotdesign.com/crazy.htm
OBSERVE + DISCUSS
www.bbc.co.uk/.../synoptic_charts_rev2.shtml
www.physicalgeography.net/fundamentals/7r.html
• warmer air is moving in a region of cooler air
• warmer less dense air rises + slides up and over the cooler air
• warmer air begins to cool as it rises up
• water vapor in the warmer cool has to condense + precipitation
will form over a large area
• high cirrus clouds are seen first
• clouds become lower + lower as the front approaches
REMEMBER:
HOT or WARM air is lighter and less dense than cool air.
Warmer air has less force than cooler air.
http://disney-clipart.com/Disney-Character-Clipart.php
www.aos.wisc.edu/~aalopez/aos101/wk13.html
etc.usf.edu/clipart/19400/19477/feather_19477.htm
“Light as a feather”
type of breeze.
www.camelotdesign.com/crazy.htm
OBSERVE + DISCUSS
http://library.thinkquest.org/C0125863/weather/image/front_stationary_en.gif
http://www.thedeets.com/wp-content/uploads/2007/08/arm-wrestling-shocker.jpg
• This front can stay in the same location for several days.
• cloudiness + precipitation occur along the front
• precipitation can be heavy since the front does not move very much
“Stalled” air masses. Not moving.
www.camelotdesign.com/crazy.htm
http://www.kewaunee.k12.wi.us/Clipart/Sport%20Clipart/Wrestling%20Clipart/wrestlers_arm_locked_sm_wht.gif
• a warm air mass and a cold air mass meet but NEITHER ONE
advances
OBSERVE + DISCUSS
http://www.kidsgeo.com/images/stationary-front_sm.jpg
www.physicalgeography.net/fundamentals/7r.html
http://www.kewaunee.k12.wi.us/Clipart/Sport%20Clipart/Wrestling%20Clipart/wrestlers_arm_locked_sm_wht.gif
• FAST moving COLD front overtakes a
SSSLLLOOOWWW moving warm front
• produces cloudy weather with
precipitation
REMEMBER:
WARM air is lighter and less dense than cool air.
Warmer air gets pushed up and out of the way by the
rushing COLDER air. But warm air can hold the moisture
for the clouds and precipitation.
library.thinkquest.org/.../weather/front.html
http://disney-clipart.com/Disney-Character-Clipart.php
http://www.goldiproductions.com/images/cba/weather/weath_coldocclusion.jpg
http://www.mrsciguy.com/sciimages/cyclone04.gif
http://www.pilotfriend.com/training/flight_training/met/images2/12.gif
http://physics.uwstout.edu/wx/u8/U8_12c.gif
OBSERVE + DISCUSS
OBSERVE + DISCUSS
http://www.bbc.co.uk/schools/gcsebitesize/geography/images/g_wc_pwc5.gif
OBSERVE + DISCUSS
http://earthscience.files.wordpress.com/2007/05/fronts.jpg
Cool Air +
Moist
Cool Air +
Moist
COLD Air
+ DRY
HOT Air +
DRY
Warm Air
+ Moist
Warm Air
+ Moist
earth.usc.edu/.../Catalina/WeatherPatterns.html
http://apollo.lsc.vsc.edu/classes/met130/notes/chapter11/graphics/cf_xsect.jpg
http://earth.usc.edu/~stott/Catalina/images/weatherimages.jpg/ninefive.jpg
http://www.cartoonstock.com/lowres/cza0530l.jpg
http://www.free-online-private-pilot-ground-school.com/images/occluded-front.gif
http://tornado.sfsu.edu/geosciences/Geosciences_Docs/Activities/SLS_Conference_2006/Furnas/May22_files/image003.jpg
On 22 May 2004, a supercell thunderstorm (hereafter referred to as the “Furnas
County storm”) developed in extreme northwest KS (southwest of McCook,
Nebraska) and moved through Furnas and Harlan Counties, Nebraska, spawning
3 tornadoes during its life cycle (Fig. 1). Tornado T1 was the largest (Fig. 2) but
because it was in open country and did no significant damage (light damage to a
farm and several trees debarked) was given a rating of F1.
This Power Point Presentation was created by Janet Moran, March 2008,
for science classes at Copeland Middle School, Rockaway Township, NJ.
Edited by Mrs. Thomas For HBW.
All pictures used in this Power Point Presentation contain web
site links to credit intellectual property.
Please follow those links to find more information about
MASSES and FRONTS.
AIR