In science, we will continue to talk about climate and weather. We will have a vocabulary test on Tuesday and a chapter test on Friday based on the following study guide pasted at the end of this blog entry. Mr. Brandon will be stopping by Monday to do a fun experiment on the water cycle with you. Mr. Brian will also be available to answer all of your questions associated with your "Water Molecule Story". Don't forget that your "Cloudy with a Change of Learning" choice sheet is due Friday, also. Make sure you save up enough energy to enjoy our field trip to the Mighty 8th Air Force Museum on Friday! Your permission slip and $5 are due to me by Wednesday.
See you tomorrow,
Mr. Trent
The
Atmosphere
1. 78% of our atmosphere is Nitogen,
21% is Oxygen, and the remaining 1% is a mixture of other gases.
2. Layers of the Atmosphere
a. Troposphere- lowest level
where weather happens.
b. Stratosphere- gases are
layered in this layer
c. Mesosphere- coldest layer
d. Thermosphere- highest layer,
hottest layer
The
Water Cycle
1. The water cycle is the
continuous movement of water from sources on Earth’s surface into the air, onto
and over the land, into the ground, and back to the surface.
2. The sun “fuels” the water
cycle
3. Humidity- the amount of water in the
air
4. Evaporation- water changing from a
liquid to a gas
5. Condensation- water changing from a gas
to a liquid
6. Dew Point- the temperature at which
water in a gaseous state changes to a liquid
Clouds
1. Cloud- a collection of small
water droplets or ice crystals
suspended in the air, which
forms when the air is cooled and condensation forms.
a. Cumulus Clouds- puffy, white clouds with flat
bottoms.
b. Cumulonimbus Clouds- large, black storm clouds.
c. Stratus
Clouds- layered gray clouds that bring long periods
of rain or snow.
d. Cirrus Clouds- thin, feathery, high clouds.
Air
Masses
1. Maritime- form over water
(bring wet weather)
2. Continental- form over land
(bring dry weather)
3. Tropical- form near the
equator (bring warm weather)
4. Polar- form near the poles (bring
cold weather)
Types of Weather Fronts
When large masses of warm air and cold
air meet, they do not mix. Instead, they form a front, usually hundreds of
miles long. When a front passes, the weather changes. The chart describes the
four main types of fronts and the weather changes each type brings.
Type of Front
|
How It Forms
|
Weather it Brings
|
Cold
front
|
Forms
when a cold air mass pushes under a warm air mass, forcing the warm air to
rise.
|
Thunderheads
can form as the moisture in the warm air mass rises, cools, and condenses. As
the front moves through, cool, fair weather is likely to follow.
|
Warm
front
|
Forms
when a moist, warm air mass slides up and over a cold air mass.
|
As
the warm air mass rises, it condenses into a broad area of clouds. A warm
front brings gentle rain
or
light snow, followed by warmer, milder weather.
|
Stationary
front
|
Forms
when warm and cold air meet and neither air mass has the force
to move the other. They remain stationary, or “standing still.” |
Where
the warm and cold air meet, clouds and fog form, and it may rain or snow. Can
bring many days of clouds and precipi- tation.
|
Occluded
Front
|
Forms
when a warm air mass gets caught between two cold air masses. The warm air
mass rises as the cool air masses push and meet in the middle.
|
The
temperature drops
as the warm air mass is occluded, or “cut off,” from the ground and pushed upward. Can bring strong winds and heavy precipitation. |
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