Science 1
The basic cause of all weather is the?
Sun
Scientists who study the weather are called?
Meteorologists
The imaginary line running through the earth from North Pole to South Pole is the?
axis
The process in which water vapor leaves the air and changes into liquid water is called ___.
condensation
Air is saturated when the humidity of the air is at ___ percent.
100
The calm region of very low air pressure in the center of a tornado is called the ___.
eye
Layers of flat clouds belong to the ___ family.
stratus
Wispy, curly clouds very high in the atmosphere belong to the ___ family.
cirrus
Sheets of clouds that often produce rain are ___ clouds.
stratus
Clouds are made of very small ice crystals are ___ clouds.
cirrus
"Thunderhead" is another name for a ___ cloud.
cumulonimbus
If a tornado has been spotted, meteorologists issue a tornado ___.
warning.
The air that we live in receives most of its warmth from the?
ground
Different seasons are caused by the ___ of the earth's axis.
tilt
Winds are produced by ____ differences on the earth.
temperature
The earth's surface spins at over ___ miles per hour.
1,000
Falling ice crystals melt slightly, stick, and freeze together into snowflakes is?
wet snow
The boundary between two air masses is called a?
front
The lowest possible temperature at which air is able to hold all of its water vapor is its ___.
dew point
Falling ice crystals melt into raindrops, then refreeze and land on the earth as tiny pieces of ice is?
sleet
Falling ice crystals melt, hit the earth as liquid rain, but freeze as soon as they land is?
freezing rain
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 is?
hail
Puffy, bulgy clouds belongs to the ___ family.
cumulus
Lightning bolts that do not come in contact with the ground but remain within the cloud are known as ___ lightning.
sheet
Warm air is heavier than cold air.
True or False?
False/ lighter
The amount of water vapor that the air can hold at a given temperature is the ___ ___ of the air.
relative humidity
Water vapor that condenses to form liquid water on the ground is called ___.
dew
Water vapor that condenses and forms frozen water on the ground is called ___.
frost
An ice crystal in a cloud becomes too heavy, falls, melts and lands on the earth as liquid water is?
rain
The thin channel of charged air through which a lightning bolt can travel is the ___.
step leader
A term used to describe a cloud from which rain is falling is ___.
nimbus
The broad, flat top of a cumulonimbus cloud is called a ___ top.
anvil
When opposite electrical charges build up in vary tall clouds, ___ is produced.
lightning
A rapid expansion of superheated air causes shock waves that we hear as ___.
thunder
The type of storm that packs the most destructive power into the smallest space is the ___.
tornado
The row of thunderheads that build up in the front of advancing cold air is called a squall line.
True or False.
True
Write a paragraph describing five precautions you should take during a thunderstorm.
1. The safest place is indoors.
2. A car is a very 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.
In Pensacola, Florida, the temperature is 75 degrees F and the relative humidity is 100%. In Albany, New York, the temperature is 40% degrees F and the relative humidity is 100%. Is the amount of water vapor in the air over Pensacola and the air over Albany the same? Why or why not?
The air over Pensacola contains more water vapor than the air in Albany because the warmer the air is, the more water vapor it can hold. The relative humidity is the same percent (in each case) because the air is holding the most water vapor it can hold at that temperature.