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74 Cards in this Set

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  • Back
Between 30 degrees north and south latitude and the equator, the movement of air toward the equator is called ?
trade winds
The Northern Hemisphere is tilted directly toward the sun on June 21. This is called the summer_______.
solstice
The sun heats the earth through a method known as _______.
radiation
The sun heats parts of the earth _______ than others.
more
The center of a hurricane is called an ______.
eye
Hurricanes are classified into ____ categories.
5
To be classified as a hurricane, the winds must go above _____ miles per hour.
74
If a tornado is coming and you are in open country, move at _______ angles away from it.
Right
If a tornado is coming and time permits, get to a _____ or underground.
Basement
A tornado's _______ are the main reason for the tremendous destruction associated with tornadoes.
winds
_________ is the most dangerous part of a thunderstorm.
lightning
The ______ stage of a thunderstorm is dominated by updrafts.
building
________ come from cumulonimbus clouds and always possess thunder and lightning.
thunderstorms
When three differing air masses are involved with each other, it is called an _______ front.
occluded
When air masses bump against each other, but not strong enough to force movement, it is called a _____ front.
stationary
A ____ front occurs when the air moving into the area is colder than the already present warmer air.
cold
A ______ front occurs when warm air moves into an area of colder air and they collide.
warm
A boundary between two air masses is called a _________.
front
Air masses are identified by a two-letter code consisting of a _____ letter and a _________ letter.
capital lowercase
An ____ _____ is a huge body of air, usually 1,000 miles or more across that has the same temperature and moisture characteristics.
air mass
Rain that freezes on contact with the ground or highway is called ___ _____.
freezing rain
__________ is the general term given to the various types of condensed water vapor that fall to the Earth's surface, such as rain or snow.
precipitation
Many types of ______ clouds are associated with turbulence.
cumulus
________ is the unrest or disturbance of the air and refers to its instability.
turbulence
_______ is the cloud that produces thunderstorms with thunder and lightning.
cumulonimbus
________ is heavier and darker than stratus and produces rain that can last for hours.
nimbostratus
______ clouds are white, thin, wispy clouds, usually in patches, filaments, hooks or bands and are mainly composed of ice crystals.
cirrus
_______ has a very uniform appearance with very little vertical development.
stratus
______ is a fair weather cloud indicating good weather.
cumulus
______ is composed of tiny droplets of liquid water in contact with the surface. It is actually a cloud that is touching the ground.
fog
Clouds and fog are products of ________.
condensation
Converting water vapor to a liquid is called _______.
condensation
The temperature at which the air becomes saturated is called the ____ _____.
dew point
When a parcel of air is holding all of the water it can, it is called ________.
saturation
_____ is the most important element in the development of weather.
moisture
An aneroid _____ is found in weather stations and gives a permanent record of pressure readings.
barometer
Scientists and meteorologists mainly use a ______ barometer.
mercury
The weight or push on the Earth's surface is called _____ _____.
atmospheric pressure
Warmer temperatures require ______ runways for takeoff.
longer
_______ is a measure of molecular motion expressed on a man-made scale.
temperature
______ is the total energy of all molecules within a substance.
heat
A _______ is defined as a downdraft or downburst of wind.
microburst
A strong tailwind will _____ a plane's air speed.
increase
Airplanes takeoff _____ the wind because the wind gives the plane more lift.
into
To determine ______ ______ you use temperature and wind speed to explain how cold it feels.
wind chill
A scale for estimating winds on either land or sea is called the _______ scale.
Beaufort
A knot equals _____ mph.
1.1
______ ________ is defined as the direction from which the wind is blowing.
wind direction
______ is a body of air in motion.
wind
The _____ ______ is wind that usually crosses the US at 30,000-35,000 feet and generally moves in a west to east direction.
jet stream
Winds at about 60 degrees latitude result from the air over the poles cooling, sinking and spreading out. This area of winds is called the Polar _______.
easterlies
Prevailing _______ in the Northern Hemisphere are responsible for many of the weather movements across the US and Canada.
Westerlies
Converging trade winds can cause an area of calm winds. This area of calm is called the ______.
doldrums
________ ________ is the amount of humidity in the air compared to its total water vapor capacity at a given temperature.
relative humidity
Warm air molecules are spaced ______ _______ than cool air molecules.
farther apart
Warm air _______. This is an ingredient for producing clouds.
rises
Thunderstorms have three stages: ______, _____ and _______.
building, mature, dissipating
There are three basic cloud forms: _________, ________ and ________.
cumulus, stratus, cirrus
The sun heats the Earth and is the fundamental cause of our _______.
weather
The lowercase letter of an air mass is either an ___ (_________) or c (_________).
m (maritime), c (continental)
Maritime - m, means moisture, water (true/false)
TRUE
Continental - c, means dry (true/false)
TRUE
The spring (vernal) equinox occurs on March 21, and the _________ equinox occurs on September 22. On both occasions, the sun's direct rays strike the equator.
spring (vernal), fall (autumnal)
The Fujita Wind Damage Scale explains the categories of ______ _____and expected damage for tornadoes.
wind speed
The Earth rotates on its axis in a _________ direction in the Northern Hemisphere.
counterclockwise
The Earth rotates on its axis at an angle of ___ degrees.
23.5
On December 22, the Northern Hemisphere is tilted directly away from the sun. This is called the winter_______.
solstice
Moisture, in its gaseous state, is called _______ ______.
water vapor
Fahrenheit's freezing point is____degrees and its boiling point is ____.
32, 212
Clouds are made up of minute droplets of water or tiny_____ of _____ or both.
crystals of ice
Celsius freezing point is ____degrees and its boiling point is ____degrees.
0, 100
An air mass, temperature or latitude is placed into four categories: polar(P), _____(A), _______(T) and equatorial(E).
arctic, tropical
About ____ % of the sun's radiation is absorbed by the Earth's surface. The other _____% is reflected and ________ in the atmosphere and space.
50, 50, absorbed
The uneven or unequal heating causes _______ and pressure differences. This creates circulation or the movement of air.
temperature