Flashcards in Test 8, Chapter 8 Deck (39):
The basic cause of all weather is the
Scientists who study the weather are called
The imaginary line running through the earth from North Pole to South Pole is the
The air that we live in receives most of its warmth from the
Different seasons are caused by the ___ of the earth's axis.
Winds are produced by ____ differences on the earth.
Warm air is ____ than cool air.
The earth's surface spins at over ____ miles per hour.
You will label the following on a diagram of the earth & mark the 2 areas that have the most changeable weather.
prevailing westerlies *
northeast trade winds
southeast trade winds
prevailing westerlies *
The amount of water vapor that the air can hold at a given temperature is the ____ of the air.
The lowest possible temperature at which air is able to hold all of its water vapor is its
the process in which water vapor leaves the air and changes into liquid water is called
Air is saturated when the humidity of the air is ___ percent.
Water vapor that condenses to form liquid water on the ground is called
water vapor that condenses and forms frozen water on the ground is called
An ice crystal in a cloud becomes too heavy, falls, melts, and lands on the earth as liquid water.
falling ice crystals melt slightly, stick, and freeze together into snowflakes
falling ice crystals melt into raindrops, then refreeze and land on earth as tiny pieces of ice.
falling ice crystals melt, hit the earth as liquid rain, but refreeze as soon as they land
a small piece of ice is tossed up and down inside a cloud, forming several layers of ice, until it is too heavy and falls to earth.
puffy, bulgy clouds belong the the ___ family
layers of flat clouds belong to the ___ family
wispy, curly clouds very high in the atmosphere belong to the ___ family
sheets of clouds that often produce rain are___ clouds
clouds made of very small ice crystals are ___ clouds
"thunderhead" is another name for a ___ cloud
a term used to describe a cloud from which rain is falling is
the broad, flat top of a cumulonimbus cloud is called an ____ top.
When opposite electrical charges build up in very tall clouds ___ is produced.
The rapid expansion of superheated air causes shock waves that we hear as __
the type of storm that packs the most destructive power into the smallest space is the ____
the calm region of very low air pressure in the center of a tornado is called the ___
If a tornado has been spotted, meteorologists issue a tornado ___
The thin channed of charged air through which a lightning bolt can travel is the ____
Lightning bolts that do not come in contact with the ground but remain within the cloud are known as ____ lightning.
The row of thunderheads that builds up in the front of advancing cold air is called a ___ line
The boundary between two air masses is called a
List 7 precautions you should take during a thunderstorm.
1. stay indoors
2. a car is a safe place to be
3. if you are outside, avoid being the tallest object
4. stay away from high ground or open, flat areas
5. stay away from tall objects such as trees
6. avoid being in or near water
7. do not use the telephone or electrical appliances