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Terms in this set (59)
the amount of moisture in the air
the weight of the air pushing down on the Earth
the temperature at which the air becomes saturated
a low-pressure area
the tendency of a moving object to curve due to the Earth's rotation
the moisture that falls from the clouds
a study of the atmosphere and the weather
a high-pressure area
The element that affects the weather most is:
The energy necessary for weather changes to occur comes from:
As air is warmed by the surface of the Earth, it:
at the surface of the Earth
The general flow of air from the poles to the equator occurs:
in the Northern Hemisphere
Airborne objects tend to curve to the right:
The instrument used to measure air pressure is the:
The movement of air around an anticyclone is:
As air is cooled it:
An instrument used to determine the direction of air movement is the:
in the upper troposphere
The general flow of air from the equator to the poles occurs:
An instrument for measuring the speed of the wind is the:
The primary cause of weather is due to what in temperature around the Earth?
The troposphere receives most of its heat energy directly from the what?
Celsius and Fahrenheit
Two standard scales for measuring temperature are:
Water freezes at what°C.
Water boils at what° F.
Local winds can be caused by what heating of the Earth's surface.
Blank is more dense than warm air.
The overall global circulation of air is caused by what equatorial air, what polar air, and deflection of air to the what in the Northern Hemisphere.
A narrow band of high-velocity air in the upper troposphere is called the what?
Standard sea level pressure is about
high and fair
Areas of sinking cold air generally have what pressure and what weather.
The measure of water vapor saturation of air is called what
The temperature at which air becomes saturated with water vapor is called the what?
When air is cooled, the relative humidity will:
Rain falling through sub-freezing calm air will turn into:
moisture and temperature
Which two factors appear to have the most direct influence on weather?
air mass that is hot and dry
wispy white clouds in high-altitude made of ice crystals
air mass that is cold and dry
the boundary between two meeting air masses
air mass forming over the Gulf of Mexico
air mass forming over the Pacific Ocean off the coast of Canada
direction of rotation of air around an anticyclone
puffy, tall clouds with a broad base and billowing top
clouds occurring in sheets or layers
maritime tropical air masses
Most violent storms form in:
At the center of a tornado is a:
ahead of the front
The system of clouds formed by the warm front are mostly:
When a hurricane reaches land, it:
The boundary between two air masses that are moving parallel to each other is called a(n):
What is a feature of a mature thunderstorm.
Continental and maritime describe the amount of what in the air mass.
humidity and temperature
A large air mass will generally have uniform what and what characteristics.
As moist air rises, its temperature will
What clouds consist of many tiny ice crystals and are sometimes called "mare's tale" clouds.
The cooling of an air mass from below may cause what clouds to form.
Thunderstorms are very intense what clouds which may extend up into the stratosphere.
Warm air lifted over a moving cold air mass will produce a what front.
Hail is mostly associated with:
A potential tornado which has not touched the ground is a:
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