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48 Cards in this Set
- Front
- Back
Name the four elements of weather
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temperature
wind pressure moisture |
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What is the main causes of weather conditions?
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temperature
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Describe how a thermometer works
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Inside the thermometer there is a liquid that rises when it is near something warm and sinks when it is near something cold.
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the weight of the air pushing down on the Earth
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air pressure
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a high-pressure area
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cyclone
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the tendency of a moving object to curve due to the Earth's rotation
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Coriolis effect
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a low-pressure area
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anticyclone
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the temperature at which the air becomes saturated
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dew point
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the amount of moisture in the air
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humidity
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a study of the atmosphere and the weather
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meteorology
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the moisture that falls from the clouds
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precipitation
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The energy necessary for weather changes to occur comes from _____.
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the sun
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As air is warmed by the surface of the Earth, it _____.
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rises
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The general flow of air from the poles to the equator occurs _____.
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at the surface of the Earth
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Airborne objects tend to curve to the right _____.
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in the Northern Hemisphere
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The instrument used to measure air pressure is the _____.
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barometer
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The movement of air around an anticyclone is:
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clockwise
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As air is cooled it:
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sinks
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An instrument used to determine the direction of air movement is the _____.
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wind vane
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The general flow of air from the equator to the poles occurs _____.
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in the upper troposphere
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An instrument for measuring the speed of the wind is the _____.
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anemometer
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The primary cause of weather is due to
________ in temperature around the Earth |
differences
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The troposphere receives most of its heat energy directly from the ______
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ground
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Local winds can be caused by _____ heating of the Earth's surface.
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uneven
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Cold air is more dense than warm air.
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true
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A narrow band of high-velocity air in the upper troposphere is called the jet stream
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true
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Standard sea level pressure is about _____.
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14.7 lb/in²
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Rain falling through sub-freezing calm air will turn into _____.
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sleet
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Which two factors appear to have the most direct influence on weather?
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moisture
temperature |
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Most violent storms form in _____.
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maritime tropical air masses
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At the center of a tornado is a _____.
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low-pressure area
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The system of clouds formed by the warm front are mostly _____.
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ahead of the front
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When a hurricane reaches land, it _____.
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dies out
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The boundary between two air masses that are moving parallel to each other is called a(n) _____.
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stationary front
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An anvil-shaped head is a feature of a mature thunderstorm.
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true
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The prefix nimbo- means heap.
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false
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Continental and maritime describe the amount of _________ in the air mass
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humidity
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Cirrus clouds consist of many tiny ice crystals and are sometimes called "mare's tale" clouds.
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true
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The cooling of an air mass from below may cause stratus clouds to form
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true
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Warm air lifted over a moving cold air mass will produce a cold front
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true
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The two conditions required for thunderstorms are:
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cold front lifting warm, moist air
rapidly rising air heated from ground |
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Hail is mostly associated with _____
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thunderstorms
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A potential tornado which has not touched the ground is a _____.
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funnel cloud
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People are able to predict future events to some extent because
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God created an orderly world
people understand some of the physical laws of nature |
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To make weather information easier to understand, weather stations:
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make observations at the same time of day
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The semicircles on the symbol for a warm front indicate _____.
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the direction of motion
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Weather balloons are sent into the atmosphere to record
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temperature
pressure humidity |
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Maps which indicate the expected future weather conditions are called
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short range forecasts
extended forecasts |