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Mon. 5/6 or Tues. 5/7. Test and INB check today. Why does the earth need an atmosphere? To protect the earth from solar winds To protect the earth from the sun’s radiation To protect the earth from the sun’s magnetic fields All of the above. Title Page: pg.95. Chapter 24 Weather Title

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mon 5 6 or tues 5 7
Mon. 5/6 or Tues. 5/7
  • Test and INB check today.
Why does the earth need an atmosphere?
  • To protect the earth from solar winds
  • To protect the earth from the sun’s radiation
  • To protect the earth from the sun’s magnetic fields
  • All of the above
title page pg 95
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
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?
    • Barometer
    • Anemometer
    • Thermometer
    • Psychrometer
in pg 96
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
Thru 1: Pg. 97

Movie: Lightning!

  • 15 facts
thru 2 pg 98 99 use pages 611 613 of the textbook
Thru 2: Pg. 98-99Use pages 611-613 of the textbook

Weather Instruments

Wind Vane






  • Definition
  • 2 facts
  • Make sure you ABC chart has 20 terms on it.
A parcel of hot, moisture-laden air rises within the atmosphere.  Which occurrence is UNLIKELY to follow?  The parcel of air will
    • get warmer and continue to rise.
    • get cooler and stop rising.
    • begin to condense into a cloud.
    • begin to precipitate.
in pg 100
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

Chapter 23 Weather

Pg. 101

Cornell Notes

weather versus climate
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
Who studies weather?
  • Meteorologist-scientist who studies the weather.
what controls 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)
collisions of air masses
  • When two air masses collide, that boundary is called a FRONT.
    • 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
Types of Fronts

Warm Front

Cold Front

Cold air and warm air

stand still

Stationary Front Map Symbol

Occluded Front

Stationary Front

jet streams
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
Thru 2

Pg. 102

3 Column Vocab

  • Air mass
  • Continental air mass
  • Maritime air mass
  • Cold front
  • Warm front
  • Occluded front

Pg. 103

7. Stationary front

  • Isobar
  • Isotherm

10. Tornado

  • Hurricane

12. Meteorologist

  • What type of front is this?
  • How do you know?
Which statement best describes weather?  Weather is
    • very easy to predict, as the atmosphere is very stable.
    • an average of the atmospheric conditions in an area over a long period of time.
    • the current conditions of the atmosphere at a certain time and place.
    • an average of the atmospheric conditions in over a short period of  time.
in pg 104
In: pg. 104
  • 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
Thru 1: pg. 105

4 Types of Fronts

  • Draw and label each type of front.
  • Color warm air red and cold air blue
stationary front1
Stationary Front

Stationary Front Map Symbol

thru 21
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.
  • What are 5 pieces of info. a weather map gives you?
Why might a meteorologist compare a new weather map to one that is a day old?
    • The weather conditions yesterday can accurately predict what type of weather will occur today.
    • A comparison of the maps can help determine how fast fronts are moving.
    • Meteorologists never compare current weather maps with day old maps.
    • If an area experienced precipitation one day, it will experience precipitation the next day.
in pg 108
In: pg. 108

Use the weather map at your desk to answer the following questions:

  • In Las Vegas, what was the
    • Date?
    • High temp?
    • Low temp?
    • Wind direction?
    • Wind speed?
    • Cloud cover?

2. On the National Map,

    • What types of front(s) were moving across the country?
    • Where was there precipitation?
    • What kind was it?
thru 1 pg 109
Thru 1: pg 109

Article: Submerged City

  • Read the article and answer the questions.
thru 22
Thru 2

Pg. 110

Pg. 111

Tornado Coloring Book

  • Color the arrows representing rising hot air red and arrows representing falling cold air blue.
  • Is a hurricane likely to hit Las Vegas? Why or why not?
mon 5 20 and tues 5 21
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
    • decreases.
    • increases.
    • stays the same.
    • increases and then decreases.
in pg 112
In: pg.112

Absolute humidity

Relative humidity




Using a double bubble map, compare and contrast absolute and relative 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
Thru 1: Pg.113
  • Movie: Tornado!
    • 15 facts
  • What type of weather is a low pressure center associated with?
wed 5 22 and thurs 5 23
Wed. 5/22 and Thurs. 5/23
  • Test and INB Check today