General Science - Weather, Test
low pressure areas:
- rotate counterclockwise - usually have stormy weather
water boils at
100 degrees Celsius
air pressure at sea level
14.7 lb/sq in (pounds per square inch)
anticyclone
a high-pressure area
rising warm air produces
a low pressure area
cyclone
a low-pressure area
anvil-shaped head is a feature of
a mature thunderstorm
meteorology
a study of the atmosphere and the weather
warmest part of the troposphere:
bottom
movement of air around an anticyclone:
clockwise
when a hurricane reaches land,
it dies out
accurate forecasts require careful study of the location, size, movement, and characteristics of
large air masses
cumulus and cumulonimbus clouds
most likely to be formed by a cold front
the troposphere
nearly all weather occurs in the layer of the atmosphere called
major changes in the weather are indicated by
rapid changes in the barometer
comparison of the actual amount of water vapor in the air to the maximum amount it can hold
relative humidity
water vapor that freezes directly into ice crystals
snow
associated with stable air
stratus clouds cold air below warm air no vertical air movement fog
four major factors affecting weather:
temperature wind pressure humidity
humidity
the amount of moisture in the air
nimbostratus clouds
the gentle lifting of warm, moist air as it moves up and over colder air
precipitation
the moisture that falls from the clouds
the greater the difference in weather conditions on two sides of the front
the more severe the weather will be
when air is saturated
the relative humidity is 100%
dew point
the temperature at which the air becomes saturated
Coriolis effect
the tendency of a moving object to curve due to the Earth's rotation
air pressure
the weight of the air pushing down on the Earth
hail is mostly associated with
thunderstorms
large destructive cyclone:
typhoon hurricane
jet stream flow in the United States
west -> east
air mas
when a large body of air over land or water does not move for a long period of time
