Transcript Cold air and warm air stand still

Mon. 5/6 or Tues. 5/7
• Test and INB check today.
Why does the earth need an atmosphere?
a. To protect the earth from solar winds
b. To protect the earth from the sun’s radiation
c. To protect the earth from the sun’s magnetic
fields
d. All of the above
Title Page: pg.95
Chapter 24 Weather
• Title
• 3 pictures/keywords
• 3 colors
Chapter 25 Climate
• Title
• 3 pictures/keywords
• 3 colors
Wed. 5/8 and Thurs. 5/9
• If you were absent last class, you missed a test
and INB check.
• Which weather tool is used to measure the
average energy of the particles present?
A.
B.
C.
D.
Barometer
Anemometer
Thermometer
Psychrometer
In: pg. 96
Weather ABC Chart
• Fill in as many terms related to weather as you
can.
• You need at least 10!
• Please number them.
Thru 1: Pg. 97
Movie: Lightning!
• 15 facts
Thru 2: Pg. 98-99
Use pages 611-613 of the textbook
Weather Instruments
Thermometer
• Definition
• 2 facts
Barometer
Anemometer
Wind Vane
Radiosonde
Radar
Out
• Make sure you ABC chart has 20 terms on it.
Fri. 5/10 or Mon. 5/12
• A parcel of hot, moisture-laden air rises within
the atmosphere. Which occurrence is
UNLIKELY to follow? The parcel of air will
a.
b.
c.
d.
get warmer and continue to rise.
get cooler and stop rising.
begin to condense into a cloud.
begin to precipitate.
In: pg. 100
• What is the weather like today?
• What is the climate of Las Vegas?
• What is the difference between weather and
climate?
Chapter 23 Weather
Pg. 101
Cornell Notes
Weather Versus Climate
• Weather is what is happening in the
atmosphere over a few hours or days.
• Climate is the overall weather of an area.
Who studies weather?
• Meteorologist-scientist who studies the
weather.
What controls the weather?
• Short answer – AIR MASSES
– Body of air that is characterized by similar
temperatures and amounts of moisture at any
given altitude.
CLASSIFIED BY >>>
• WARM or COLD
– Warm - tropical (forms near equator)
– Cold - polar (forms near poles)
• WET or DRY
– Wet – maritime (forms over bodies of water)
– Dry – continental (forms over land)
WHAT ARE THE AIR MASSES FOR THE
UNITED STATES?
COLLISIONS OF AIR MASSES
• When two air masses collide, that boundary is
called a FRONT.
• FOUR TYPES
– Warm Front
– Cold Front
– Stationary Front
– Occluded Front
NAMING FRONTS
• The type of front depends on both the
direction in which the air mass is moving and
the characteristics of the air mass.
COLD FRONT
• The cold air mass is
replacing the warm air
mass.
• The air behind a cold
front is colder and
typically drier than the
air ahead of it
WARM FRONT
• A cold air mass is receding.
• Favors the development of
widespread, continuous
precipitation
STATIONARY FRONT
• A front that is not moving.
• Stationary fronts can also produce significant
weather and are often tied to flooding events
OCCLUDED FRONT
• Cold fronts move faster than warm fronts.
• Sometimes in a storm system the cold front
will "catch up" to the warm front.
• Which ever air mass is the coldest undercuts
the other.
Types of Fronts
Cold Front
Warm Front
Cold air and warm air
stand still
Occluded Front
Stationary
Stationary Front
FrontMap Symbol
Jet streams
• A jet stream is a narrow band of high-speed
winds that blow in the upper troposphere.
• Form at the boundary between a cold air mass
and a warm air mass.
• Flow along the boundary.
• Push storms and other weather around.
Thru 2
Pg. 102
3 Column Vocab
1. Air mass
2. Continental air mass
3. Maritime air mass
4. Cold front
5. Warm front
6. Occluded front
Pg. 103
7. Stationary front
8. Isobar
9. Isotherm
10. Tornado
11.Hurricane
12. Meteorologist
Out
1. What type of front
is this?
2. How do you know?
Tues. 5/14 and Wed. 5/15
• Which statement best describes
weather? Weather is
a. very easy to predict, as the atmosphere is very
stable.
b. an average of the atmospheric conditions in an
area over a long period of time.
c. the current conditions of the atmosphere at a
certain time and place.
d. an average of the atmospheric conditions in over
a short period of time.
In: pg. 104
1. What is the abbreviation for each type of air mass?
• Maritime polar
• Maritime tropical
• Continental polar
• Continental tropical
2. What type of air mass is over Nevada?
Thru 1: pg. 105
4 Types of Fronts
• Draw and label each type of front.
• Color warm air red and cold air blue
Cold Front
Warm Front
Occluded Front
Stationary Front
Stationary Front
Map Symbol
Thru 2
Pg. 106
• Learning to Read a
Weather Map
– Tape this in as reference.
Pg. 107
• Reading a Weather Map
Worksheet.
– Complete the questions
on the back using the
map on the front.
Out
• What are 5 pieces of info. a weather map
gives you?
Thurs. 5/16 and Fri. 5/17
• Why might a meteorologist compare a new
weather map to one that is a day old?
a. The weather conditions yesterday can accurately
predict what type of weather will occur today.
b. A comparison of the maps can help determine
how fast fronts are moving.
c. Meteorologists never compare current weather
maps with day old maps.
d. If an area experienced precipitation one day, it
will experience precipitation the next day.
In: pg. 108
Use the weather map at your desk to answer the
following questions:
1. In Las Vegas, what was the
a)
b)
c)
d)
e)
f)
Date?
High temp?
Low temp?
Wind direction?
Wind speed?
Cloud cover?
2. On the National Map,
a)
b)
c)
What types of front(s) were moving across the country?
Where was there precipitation?
What kind was it?
Thru 1: pg 109
Article: Submerged City
• Read the article and answer the questions.
• http://www.cbsnews.com/video/watch/?id=
50134142n
Thru 2
Pg. 110
Pg. 111
Tornado Coloring Book
• Color the arrows
representing rising hot
air red and arrows
representing falling cold
air blue.
Out
• Is a hurricane likely to hit Las Vegas? Why or
why not?
Mon. 5/20 and Tues. 5/21
• Test and INB check next class.
As air temperature increases the amount of water vapor that can be held
A. decreases.
B. increases.
C. stays the same.
D. increases and then decreases.
In: pg.112
Using a double bubble map, compare and contrast
absolute and relative humidity.
Relative
humidity
Absolute
humidity
Differences
Similarities
Differences
•
Humidity
Humidity is the amount of water vapor in the air.
Warmer air can hold more water vapor than colder air
and usually has a higher humidity. Absolute humidity
is a measure of the actual amount of water vapor in the
air. For example, the very moist air of the tropics might
have 18 g of water for every 1 kg of air, giving an
absolute humidity of 18g/1 kg. While drier polar air
may only have an absolute humidity of 1 g/kg. More
often, humidity is expressed as relative humidity. This
is the amount of water vapor in the air compared to the
amount of water vapor the air could potentially hold.
Thus, it is expressed as a percent. For example, at 25o C,
air would be 100% saturated if in held 20 g of water.
This would be 100% humidity(20g/20g). If this air held
only 5g of water it would have 5g/20g or 25% relative
humidity.
Thru 1: Pg.113
• Movie: Tornado!
– 15 facts
• Do your study guide!
Out
• What type of weather is a low pressure center
associated with?
Wed. 5/22 and Thurs. 5/23
• Test and INB Check today