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Air Pressure Lesson 4. Chapter 5. Essential Question. What factors affect the weather? What are some Properties of Air? What Instruments Measure Air Pressure? How Does Altitude Affect Air Pressure and Density?. Page 170. What are some Properties of Air? .

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essential question
Essential Question
  • What factors affect the weather?
      • What are some Properties of Air?
      • What Instruments Measure Air Pressure?
      • How Does Altitude Affect Air Pressure and Density?
what are some properties of air
What are some Properties of Air?

Because air has mass, it also has other properties, including density and pressure.

  • Density:the amount of mass in a given volume of air.
  • More molecules = more density
  • Fewer molecules = less density
what are some properties of air1
What are some Properties of Air?

Because air has mass, it also has other properties, including density and pressure.

  • Pressure:is the result of the weight of a column of air pushing on an area
  • The weight of air above your desk = the weight of a school bus!
  • Air doesn’t crush your desk because the air molecules push in all directions.
what instruments measure air pressure
What Instruments Measure Air Pressure?

Baro- means “weight”

What do you think meter means?

Amount / Measure

what instruments measure air pressure1
What Instruments Measure Air Pressure?
  • A Barometer is an instrument used to measure air pressure.
  • Two kinds of barometers Mercury & Aneroid (without liquid)
how does altitude affect air pressure and density
How Does Altitude Affect Air Pressure and Density?
  • Altitude or elevation is the distance above sea level.
  • Air Pressure Decreases as Altitude Increases.
  • As Air Pressure Decreases Density Decreases.
home learning
Home Learning
  • Complete Lesson 4 Assess Your Understanding
  • Review & Assessment #10-13 Page 186
  • Extra Credit Wind Vane 10/15
  • Gizmos #1-4 10/18
  • Chapter 5 Vocabulary 10/18
  • Fairchild Activity #2 Writing: 10/23
essential question1
Essential Question
  • What factors affect the weather?
      • What causes Wind?
differences in air pressure
Differences in Air Pressure
  • Differences in air pressure cause air to move.
  • Wind is movement of air parallel to the Earth’s surface.
  • Differences in air pressure are caused by unequal heating of the atmosphere
measuring wind
Measuring Wind
  • Winds are described by their direction and speed!
  • How can you measure wind speed?

Anemometer

wind chill factor
Wind-chill Factor
  • Wind can cause increased cooling.
  • The stronger the wind, the colder you feel!
local winds
Local Winds
  • Winds blowing over short distances.
  • Unequal heating of the Earth’s surface in a small area.
coriolis effect
Coriolis effect
  • The way the Earth's rotation makes winds curve.
global winds
Global winds
  • The movement of air between the equator and the poles
the three major global wind belts
The three major global wind belts.

1. trade winds

2. prevailing westerlies

3. polar easterlies

horse latitudes
Horse latitudes
  • Area near the Equator where warm air rises. Little or no wind.(The trade winds meet at the doldrums)
  • Belt of calm air at about 30 degrees north and south. Sailors ran out of food and threw their horses overboard here.
activity
Activity
  • Create global wind diagram on a paper plate
home learning1
Home Learning
  • Complete Lesson 5 Assess Your Understanding
  • Review & Assessment #14-16 Page 186
  • Extra Credit Wind Vane 10/15
  • Solar Cooker Supplies! 10/16
  • Gizmos #1-4 10/18
  • Chapter 5 Vocabulary 10/18
  • Fairchild Activity #2 Writing: 10/23
scientists live on beyond the grave
Scientists Live on Beyond the Grave!
  • You are ghostly called upon to use internet research, and skills used in English and History to complete a fearful science project.
  • You will create a poster tombstone for a famous scientist you are haunted by.
  • If you fail to follow the rubric then you will be banished to the underworld.
  • Include:
  • Scientist Name (5 points)
  • Date born- Date died (10 points)
  • Invention/ Discovery/ Contribution to Science(10 points)
  • Picture (5 points)
  • Student Name and period on the back(5 points)
  • Creativity and Neatness(20 points)
  • Size requirements (5 points)
  • Three(3) amazing facts about the scientist (30 points)

10/28

essential question2
Essential Question
  • What factors affect the weather?
      • What Is Relative Humidity and how Is It Measured?
what is relative humidity
What is Relative Humidity?
  • Humidity is the amount of Water Vapor in the air!
  • Relative Humidity is the percentage of water vapor that is in the air compared to the maximum amount of water vapor the air can hold at a particular temperature.
how do you measure relative humidity
How do you measure relative Humidity?
  • Relative Humidity can be measured by using an instrument called a psychrometer.
  • 2 thermometers dry & wet.
  • When it is “slung” air blows over the thermometers.
  • Wet bulb thermometer is cooled by evaporation.
  • When humidity is high this does not occur.
  • When humidity is low the temperature drops.
  • Relative humidity is found by comparing the two temperatures.
home learning2
Home Learning
  • Complete Lesson 6 Assess Your Understanding
  • Review & Assessment #17-20 Page 186
  • FBR #1-7 Page 187
  • Extra Credit Wind Vane 10/15
  • Chapter 5 = 1st chance Wednesday 10/16
  • Solar Cooker Supplies! 10/16
  • Gizmos #1-4 10/18
  • Chapter 5 Vocabulary 10/18
  • Vocabulary Quiz Friday
  • Fairchild Activity #2 Writing: 10/23
scientists live on beyond the grave1
Scientists Live on Beyond the Grave!
  • You are ghostly called upon to use internet research, and skills used in English and History to complete a fearful science project.
  • You will create a poster tombstone for a famous scientist you are haunted by.
  • If you fail to follow the rubric then you will be banished to the underworld.
  • Include:
  • Scientist Name (5 points)
  • Date born- Date died (10 points)
  • Invention/ Discovery/ Contribution to Science(10 points)
  • Picture (5 points)
  • Student Name and period on the back(5 points)
  • Creativity and Neatness(20 points)
  • Size requirements (5 points)
  • Three(3) amazing facts about the scientist (30 points)

10/28