AIR PRESSURE Does air have mass?

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Presentation transcript:

AIR PRESSURE Does air have mass? Mass- a body of matter with no specific shape Read/complete “Does Air Have Mass?, p. 6

Air pressure- the weight of the air being pulled down on an area of the Earth’s surface http://www.bom.gov.au/lam/Students_Teachers/pressure.shtml http://www.kidsknowit.com/interactive-educational-movies/free-educational-video-podcast-online.php?video-podcast=Water%20And%20Air%20Pressure

High Pressure- Regions of sinking air are called highs, high pressure regions or anticyclones. Clear skies and fair weather usually occur in these regions Low Pressure- Regions of rising air are called lows, low pressure regions, depressions or cyclones. Clouds rain and strong winds often occur in these regions. http://www.youtube.com/watch?v=vGulvutZJpg http://www.tpt.org/newtons/video.php?id=1027

Read/Complete Factors of Weather: Air Pressure, pp. 7-8

AIR PRESSURE http://www.ricecookerstudios.com/assets/interactive/int004.swf

AIR PRESSURE http://www.classzone.com/books/earth_science/terc/content/visualizations/es1901/es1901page01.cfm?chapter_no=visualization

BAROMETER- instrument that measures air pressure- two types---mercury barometer & aneroid barometer http://www.youtube.com/watch?v=VqKkAJdarZ8&feature=relmfu Read/Complete “Measuring Air Pressure: A Barometer”, pp. 9-10