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Fronts & Weather
Weather begins with the sun
The water cycle affects both
climate and weather
http://video.nationalgeographic.com/video/environment/environment-natural-disasters/landslides-and-more/weather/
Types of Fronts
Cold
Warm
Stationary
Occluded
Cold Front
An animation:
http://www.bioygeo.info/Animaciones/Frentes.swf
Cold Front
Marked on a map with a blue line and blue
triangles pointing towards the warm air.
Associated with cumulus & cumulonimbus
clouds ahead of the front in the warm air,
producing showers and thunderstorms.
Cold Front
Simple 3-D idea:
http://www.physicalgeography.net/fundamentals/7r.html
Warm Front
An animation:
http://www.bioygeo.info/Animaciones/Frentes.swf
Warm Front
Marked on a map by a red line with red semi-circles pointed towards the cool air (in the direction the warm air is retreating to.)
Generally associated with stratus type clouds, overcast skies, fog, and general rain or snow.
Warm Front
Simple 3-D idea:
http://www.physicalgeography.net/fundamentals/7r.html
Stationary Front
Marked by alternating blue lines & blue
triangles (pointed in the direction of the warmer
air) and red lines & red semi-circles (pointed in
the direction of the cooler air)
http://www.phschool.com/atschool/phsciexp/active_art/weather_fronts/
Occluded Front
Marked by a purple line with alternating purple
triangles and purple semi-circles, all pointing in
the direction of the frontal movement.
Occluded Front
Simple 3-D idea:
http://www.physicalgeography.net/fundamentals/7r.html
occluded front
stationary front
tornado
thunder
hurricane
blizzard
wind
warm front
lightning
fog
cold front
Weather Tools/Instruments A tool for measuring rainfall
Rain Gauge
A tool used to measure air pressure Barometer
A tool used to show which direction the wind is blowing Weather Vane
A tool used for measuring the humidity or moisture in the air Hygrometer
A tool that measures the force and speed of the wind Anemometer
There are three main types of rainfall –
relief, convectional and frontal.
In all three situations, rainfall occurs
because air rises. Air contains water
vapour and as the air rises it cools and
condensation can occur. This means
that the water vapour returns back into
minute droplets of water and falls as
rain!
Why does it rain?
Convectional rain
Relief rain
Frontal rain
Extras
Some Weather Factors
Wind. This tool measures wind
speed. It is called an anemometer.
Precipitation. Rain, snow, sleet and
hail are all forms of precipitation.
Temperature. Temperature is how
warm or cold it is outside.
Cloud Cover. There are many types
of clouds that form in different
conditions.
Seasons on Earth
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