Download WELCOME TO SCIENCE!!! UNIT 5 LESSON 8: Meteorology

WELCOME TO SCIENCE!!!
Green Check
when you have
your notebook
out and ready!
UNIT 5 LESSON 8: Meteorology
Student Expectations…
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I will BE HERE! respond when my name is called, use polling
tools , complete classwork, notes, and chat to participate!
I will choose my attitude!
I will demonstrate respect and follow directions for my
classmates and teachers to help make their day!
I will have fun learning!
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What you can expect from class
We will explore meteorology and
how meteorologists tell weather.
Essential question:
How do meteorologists predict the weather?
Exit ticket review!
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Exit ticket review!
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High pressure systems bring nice
weather.
Hot air can hold more water molecules.
Cold air is more dense (heavy) than
warm air.
When hot and cold air collide, they can
cause thunderstorms!
Low pressure systems can bring wet
weather! YUCK!
Meteorologists like those at the National
Hurricane Center use instruments to gather
information about all weather conditions, not just
about hurricanes. Radar, weather balloons, and
satellites aid in measuring air pressure, humidity,
temperature, and other data. Combining these
measurements, meteorologists can predict whether
a day is going to be sunny, cloudy, dry, or rainy.
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__weather ballooon__________,
__radar____________, and
__satalite_________ aid in measuring
air pressure, humidity, temperature
and other data.
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Closer to home, meteorologists use tools to measure
air pressure and humidity, two very important
factors that help predict weather.
A barometer is a tool that measures air pressure. Air
pressure measurements can provide information
about developing winds.
A hygrometer measures humidity. As you know,
when air masses meet, water vapor in the air can
condense and form precipitation.
Barometer: Measures air pressure
Video link:
Yay it worked!!!
O man it didn’t!
When air pressure
increases the mercury
moves up.
Quick check
When the mercury goes up in a barometer, the
air pressure goes down. FALSE
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Air pressure and humidity play major roles in
the weather system. TRUE
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Once weather data is collected, meteorologists
develop weather maps where they can see how
air masses are approaching one another. By
comparing a current map with maps from earlier
in the day or week, meteorologists can track the
movements of air masses and fronts. Then they
can create a forecast of weather for the next few
days.
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Observations made across earth’s surface
reveal that similar weather conditions can
occur at the same time over wide areas. This is
due to the large size of air masses, which as
you may recall are fairly even in temperature,
humidity, and pressure on the earth’s surface.
Yay I got it to work!
O man I didn’t
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Since there is a lot of information to
display, but not a lot of room symbols are
used on weather maps to convey
information. You have seen some of these
symbols in this unit already.
On the map to the right, “H” and “L” are
used to show areas of high and low
pressure. The isobars, or lines around
them connect areas of equal pressure.
Isobars look a lot like contour lines on
topographic maps but connect areas of
equal air pressure instead of elevation.
Notice that around the center of an “L,”
pressure increases as the bars move away
from the center. It’s the opposite around
an “H;” pressure decreases farther away
from the center.
isobars
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Weather symbols also show where and what kind of
fronts are forming as air masses collide.
A warm front brings drizzly weather.
A cold front can cause heavy rain, thunder, and
lightning.
A stationary front may produce rainy or snowy
weather for several days.
An occluded front can cause light to heavy
precipitation that may last several days.
To the right, you can see the symbols meteorologists
use to represent each type of front. Notice that the
circles and triangles usually point to the right. That’s
because weather moves from west to east.
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By examining weather maps, meteorologists
can see how air masses, fronts, and high- and
low-pressure systems are arranged. Weather
forecasters figure out the weather that usually
comes with these conditions and then make
some predictions.
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You can see the symbols meteorologists use to
represent each type of front. Notice that the
circles and triangles usually point to the right.
That’s because weather moves from west to
east.
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Weather travels from East to West.
FALSE
What kind of
weather will the lowpressure system ring
to Chicago on Day 3?
D
Predict the
weather for
Denver on
Day 3.
A.
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Satellites gather weather data
with global views of the surface
and atmosphere.
From high above the earth,
weather satellites can take
measurements with a much
larger view than is possible
with stations on the ground.
Satellites can complete a world
picture as the earth rotates
beneath them, or monitor one
place over a long period of time.
Weather satellites are equipped
with cameras that detect visible
light, surface temperatures,
clouds, and water vapor
associated with storms and
storm fronts.
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Do you know what they are? These are
images of Hurricane Katrina, a costly
and deadly hurricane that hit the
United States in 2005.
Katrina began as a tropical wave,
developed into a tropical storm, and
eventually into a Category 5 hurricane.
The meteorologists at the National
Hurricane Center (NHC) used tools
such as radar and satellite to track the
storm’s path. As the storm grew to
massive size and changed its path, the
NHC adjusted hurricane warnings to
cover wider areas, saving lives all
across Mississippi, Louisiana, and
Alabama.
Homework slide
Exit ticket: Can be found on the Assignments
page on Science website.
End of the Quarter 2 is THURSDAY.
PLEASE MAKE SURE ALL OF YOUR
WORK IS COMPLETE.