Embed Size (px)
Citation preview
Weather and Climatepart 2
Tools to Measure Weather:
Thermometer:A liquid-filled tube used to measure air
temperature.
Temperature @ BainPop
Weather and Climatepart 2
Tools to Measure Weather:
Anemometer: An instrument that measures wind speed with small cups that spin in the wind.
Wind Vane and Wind Socks: Show wind direction.
Barometer: Measures air pressure.A spring inside can squeeze or relax as air
pressure increases or decreases
Weather and Climatepart 2
Air Mass:A huge body of air with similar air temperature and
humidity throughout.
Front:Boundaries where warm and cool air masses
meet.
Weather FrontsWeather Fronts
MAP TAP 2002-2003 Weather Fronts 5
Air Mass
A large body of air with similar temperature and moisture.
Air masses form over large land or water masses.
MAP TAP 2002-2003 Weather Fronts 6
Frontal Boundaries
Where air masses interact – also know as a front.
4 kinds of fronts:– Cold front– Warm front– Occluded front– Stationary front
Cold Front A cold air mass
is replacing a warmer air mass.
Shown on a weather map by a blue line with triangles pointing the direction the cool air is moving.
Back toactivity
MAP TAP 2002-2003 Weather Fronts 8
Warm Front
Warm air mass replacing a cooler air mass.
Shown on a weather map by a red line with half circles pointing the direction the warm air is moving.
Back toactivity
MAP TAP 2002-2003 Weather Fronts 9
Comparing Warm and Cold Fronts
Cold fronts move faster than warm fronts.
The weather activity in a cold front is often violent and happens directly at the front.
Cold fronts have sudden gusty winds high in the air
creating turbulence.
The weather activity in a warm front generally happens before the front passes.
In a warm front the cloud formation is very low often creating situations of poor visibility.
MAP TAP 2002-2003 Weather Fronts 10
Occluded Fronts When a warm front
is trapped by 2 cold fronts.
Shown on a weather map by a purple line with alternating triangles and semicircles pointing the direction the front is moving.
Back toactivity
MAP TAP 2002-2003
Stationary Fronts A front that stops moving or is moving very slowly. Shown on a weather map with alternating red
semicircles pointing away from the warm air and blue triangles pointing away from the cold air.
Back toactivity
Locate the 4 types of fronts on this weather map.
Hint1
Hint2
Hint3
Hint4
Cold Fronts
Warm Front
Stationary Front
Occluded Front
Weather Fronts 17
Be a Weather Forecaster
You are planning to travel to Alabama in 2 days. The high temperature there for today is 68º F.
Use the map to help you predict whether the temperature in Alabama will increase, decrease, or stay the same. Explain why you think so.
18
Be a Weather Forecaster
There is a cold front approaching. The temperatures will probably be cooler behind the front.
MAP TAP 2002-2003 Weather Fronts 19
Be a Weather Forecaster
Of course, meteorologists (weather forecasters) use much more data than fronts and air masses to help them forecast the weather more accurately. But any forecast is just a prediction of what might happen. Even with the best data, weather forecasts can be wrong.
Weather and Climatepart 2
Cold Front:Develops when a cold air mass moves into a
warm air mass.
Cold Fronts often bring brief, strong storms followed by cooler, drier weather.
Weather and Climatepart 2
Warm Front:Develops when a warm air mass moves into a
cold air mass.
Warm fronts tend to bring steady, light precipitation followed by warmer, more humid
weather.
Weather and Climatepart 2
So, what occurs where air masses with different temperatures meet?
Weather and Climatepart 2
So, what occurs where air masses with different temperatures meet?
Precipitation!
Weather and Climatepart 2
Climate:The average weather pattern in an area over
many years.
Climate @ BrainPop
Weather and Climatepart 2
How can a mountain range impact an area's climate?
Weather and Climatepart 2
How can a mountain range impact an area's climate?
Often one side of a mountain range receives a lot of precipitation because air cools and loses its
moisture as it rises over the mountains.
This causes a Rain Shadow, or dry area on the other side of a mountain range.
Weather and Climatepart 2
Greenhouse Effect:Gasses that trap heat keeping Earth's climate
warm.
Global Warming:A warming of the Earth caused by more
greenhouse gases in the atmosphere.
Global Warming @ BrainPop
