chapter 28.2 Flashcards
jet stream
is a narrow band of fast-moving, high-altitude air
coriolis effect
the apparent deflection of an object due to Earth’s rotation
air mass
is a large volume of air with uniform moisture and temperature throughout
weather front
air masses interact zones
how many jet streams are there in the world?
4
how many pressure systems are there?
2
what is the low pressure system known as?
a low (L)
what direction does a low pressure system flow?
counterclockwise
what are some results that a low pressure system cause?
air rises creating clouds and precipitation
what is a high pressure system known as?
a high (H)
which direction does a high pressure system flow?
clockwise
what are some results that a high pressure system cause?
air to sink and make skies clear
what are the four weather fronts?
- cold front
- warm front
- stationary front
- occluded front
what causes a cold front?
cold air forces warm air upward in a fast and chaotic manner which creates cumulus clouds
what is a cold front represented by on the news?
blue triangles
how are warm fronts created?
warm air rises gently above cold air
what is the warm front represented by on the news?
half red looking circles
how are stationary fronts created?
cold and warm air masses meet and neither front advances
what is the stationary fronts represented by on the news?
alternated half red circles and blue triangles
how are occluded fronts created?
fast moving cold fronts overtakes a slow warm front
what is the occluded front represented on the news?
purple alternating triangles and half circles
