air pressure lesson 4. essential question what factors affect the weather? ○ what are some...

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)

Page 172

Page 173

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.

Page 174

Page 174

Page 175

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

Page 177

Measuring Wind

Winds are described by their direction and speed!

How can you measure wind speed?

Anemometer

Page 178

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.

Page 179

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 winds

2. prevailing westerlies

3. 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.

Page 181

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.

Page 182

Page 182

Page 183

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