1. Make sure you have your textbook open to 15.3 today!
Bell Ringer: 1) Please open your IAN to yesterday’s notes on greenhouse effect. 2) Review your key tech terms with the sheet in your blue tubs.

2. Essential Questions: 1) Differences between the Greenhouse Effect and Global Warming? 2) How Does the Earth Cool off?

3. The Greenhouse Effect and Life on Earth
6) The greenhouse effect: is Earth’s natural heating process. Increasing levels of greenhouse gases could cause global warming.
Many scientists have become concerned about data that show that average global temperatures have increased in the past 100 years.
7) global warming: an increase in average global temperatures. 

4. Greenhouse Effect Basics
Gases absorb the heat and act as a “blanket” to keep Earth warm.
Some greenhouse gases: water, methane, carbon dioxide.
The gases function like the glass walls and roof of a greenhouse, which allow solar energy to enter but prevent thermal energy from escaping.
Greenhouse Effect Basics

5. Runaway Greenhouse Effect
In your IAN, please copy!

6. The Greenhouse Effect Global Warming gases (CO2 and
water vapor) absorb
thermal energy and
radiate it back to
Earth
a process that
reminds us of an
actual greenhouse
an increase in
average global
temperatures
greenhouse gases
in the atmosphere
VS.

7. Manmade Causes: Industry Deforestation Cars Fossil fuels Wars Heat/AC
Arms race
Nuclear waste
Coal burning
Electricity
Land fills
Acid rain

8. Global Warming Causes Natural: Volcanoes Solar flares Cycle Orbit
Cows
Forest fires
Methane release in the arctic tundra

9. Final Research: You Decide!
Question: Is Global Warming real? Is it a natural event or man made? Is it natural and people are making it worse?
Bill Nye debate

10. Let’s Review!
Explain research on 2 different points of view for Global Warming. 5 facts each.
Try to answer the following questions:
A. What is it?
B. What is causing it?
C. What will change (ocean levels, animal/plant life)?
D. What might the temperature be in 100 years?
E. What are manmade contributions?
F. What are arguments for the ‘natural cycle’ side of it?

11. 15.3 Global Winds and Local Winds
Objectives:
Explain the relationship between air pressure and wind direction.
Describe global wind patterns.
Explain the causes of local wind patterns.
15.3 Global Winds and Local Winds
Copy into your closed notes!

12. Why Air Moves
Wind-movement of air is caused by differences in air pressure
Greater pressure difference= faster wind

13. Air Rises at the Equator and Sinks at the Poles
Differences in air pressure are generally caused by unequal heating of the Earth.
Equator
Receives more direct solar energy
Air is warmer and less dense
Warm air rises and creates low pressure area
Warm air flows to poles
Convection Currents!

14. Air Rises at the Equator and Air Sinks at the Poles, cont’d
Air is cooler and more dense
Cold air sinks
Creates high pressure area
Cold air flows toward equator
AIR will blow from H to L !!!

16. Pressure Belts Are Found Every 30 Degrees
Pressure belts- bands of high pressure and low pressure found every 30 latitude.
Sinking air causes areas of high pressure because sinking air presses down on the air beneath it.

17. PressureBelts

18. The Coriolis Effect
Apparent curving of the path of winds and ocean currents due to the Earth’s rotation.
North- winds going north curve east
South- winds going south curve west
Connection??

19. Global Winds Patterns of air circulation
Named after the direction from which they blow
Major global wind systems
Polar easterlies
Prevailing Westerlies
Trade winds

20. Global winds

21. Polar Easterlies Poles to 60 latitude in both hemispheres
Cold, dense air moves from poles to 60
Effect?
Can bring cold air to US making snow and freezing weather

22. Prevailing Westerlies
30 and 60 latitude in both hemispheres
Flow from west to east
Effect?
Can bring moist air to US making rain and snow

24. Trade Winds 30 latitude almost to equator in both hemispheres
Due to Coriolis-curve to west in N. Hemisphere and east in S. Hemisphere
Effect?
Traders used winds to move from Europe to Americas.

25. Eactivity link- visual organizer: Create one using today’s tech terms.
Brainpop Wind
Eactivity link- visual organizer: Create one using today’s tech terms.

26. Bell Ringer Day 2: In your IAN, please answer the following questions:
Take out your closed notes for 15.3
Name& Describe 3 examples of global winds.
Would there be winds if the Earth’s surface were the same temperature everywhere? Why?

27. Doldrums:
located where the trade winds of the two hemispheres meet at the equator
means “dull” or “sluggish”
an area of Low Pressure

28. The Horse Latitudes
30 north and south latitude
Very weak winds

29. Jet Stream: Atmospheric Conveyor Belts
Narrow belts of high speed winds
Blow in the upper troposphere and lower stratosphere
Effect?
Can affect movement of storms and airplane flights
Cool Fact! Did you Know?

30. Local Winds Move short distances Blow from any direction
Caused by temperature differences
Sea breeze moves from sea to land
Land breeze moves from land to sea

32. Sea Breeze

34. Land Breeze

35. Convection current

36. What effect does elevation have on winds??
How does wind blow?
Wind will flow
from high to low!!!
What effect does elevation have on winds??

37. Mountain Breeze vs,. Valley Breeze

40. Wrapping it up: What role does the Sun play? Brainpop Wind
Sun heats the land and water, changing temperatures
Different heating causes density differences, causing wind!
UNEQUAL HEATING CAUSES THE WIND!
Local Winds eactivity
Brainpop Wind

41. Greenhouse vs. Global Warming One More Time!
Global Warming Brainpop