chapter 5
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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? . - PowerPoint PPT PresentationTRANSCRIPT
CHAPTER 5
Air Pressure Lesson 4
2
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?
Density: the amount of mass in a given volume of air.
More molecules = more density Fewer molecules = less density
Because air has mass, it also has other properties, including density and pressure.
What are some Properties of Air?
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.
Because air has mass, it also has other properties, including density and pressure.
Page 171
What Instruments Measure Air Pressure?
Baro- means “weight”What do you think meter means?
Amount / Measure
What Instruments Measure Air Pressure?
A Barometer is an instrument used to measure air pressure.
Two kinds of barometers Mercury & Aneroid (without liquid)
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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.
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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
CHAPTER 5
Winds Lesson 5
17
Essential Question What factors affect the weather?
○ What causes Wind?
Page 176
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
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Measuring Wind Winds are described by their direction
and speed! How can you measure wind speed?
Anemometer
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Wind-chill Factor Wind can
cause increased cooling.
The stronger the wind, the colder you feel!
Local Winds Winds blowing over short distances. Unequal heating of the Earth’s
surface in a small area.
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Coriolis effect The way the Earth's rotation makes
winds curve.
Global winds The movement
of air between the equator and the poles
The three major global wind belts.1. trade winds2. prevailing westerlies3. polar easterlies
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 Create global wind diagram
on a paper plate
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! 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
CHAPTER 5
Relative Humidity Lesson 6
34
Essential Question What factors affect the weather?
○ What Is Relative Humidity and how Is It Measured?
Page 180
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.
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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.
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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 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