2. CHAPTER 20 WEATHER

3. 20.2 Fronts and Lows

4. 12/4 DAILY QUIZ 1. What is an air mass?
2. Give the characteristics of each air mass below cA mP cT cP mT

5. 20.2 Fronts and Lows Section 20.2 - Agenda What is a Front?
Types of Fronts
Warm
Cold
Stationary
Occluded
Life cycle of a Mid-Latitude Low 5

6. What is a Front? The boundary that separates different air masses.
Usually bring:
Changes in Temperature
Changes in Wind Direction
Changes in Humidity
Precipitation 6

7. FRONT 7

8. 1. Cold Front Advancing Cold Air Forces Warm air up at a Steep slope
Usually a narrow band of precipitation
Cumulonimbus Clouds

9. Cold
COLD FRONT
Warm
Air 9

11. 2. Warm Front Advancing Warm Air
Warm air rides over cold air at a low slope
Usually a wide band of precipitation
Brings thinner, layered clouds

13. WARM FRONT
Warm Air
Cold Air
Vis 2002 13

14. 3. Occluded Front
Cold Front catches up to Warm Front since cold fronts move twice as fast.
Warm air is squeezed up, forming clouds. 14

17. 4. Stationary Front Front is not moving.
Warm air still rises above cold air, bringing clouds and precipitation.
Can lead to flooding. 17

20. Life Cycle of a Mid-Latitude Low
Fronts are usually connected to Low Pressure systems.
As the Low spins, the fronts move and the Cold front catches up to Warm. 20

21. Takes 12 to 24 hours to get to stage 3.

22. Upper Air Flow
Upper Air Flow steers the Low along 22

23. Weather associated with Pressure Systems
As a Low moves near, the weather will change. A B C 23

26. Tuesday Journal of Assignments Journal of Learning
October 23, 2012
TODAY’S KEY IDEA: Plate Tectonics over a period of geological time has changed the patterns of Earth’s land, sea and moutains. CaStd. ES3: Dynamic Earth Processes
Journal of Assignments
Journal of Learning
Review Yesterday’s Notes
Summary Sentence of Yesterday‘s Notes
Clarifying Question on Yesterday’s Notes

27. SEISMOLOGY Monday SECONDARY IDEAS:
October 21, 2012
SECONDARY IDEAS:
Earthquakes are caused by faults along plate boundaries.
Earthquake energy is released as P waves followed by S waves.
The Primary Waves (P) are called body waves.
The following Secondary Waves (S) are called shear waves.
SEISMOLOGY
TODAY’S BIG IDEA: Plate Tectonics over a period of geological time has changed the patterns of Earth’s land, sea and moutains. CaStd. ES3: Dynamic Earth Processes

28. 11/14 TODAY… Stamp Homework Tonight’s Homework
FINISH WORK STARTED IN CLASS
Read Section 19-1, 19-2
Answer Section Assessment 19-2 & 19-2
Answer Worksheets 19-1 & 19-2
Daily Quiz
Textbook:
Answer Section Assessment
19-1 and 19-2

29. END OF LECTURE

30. SATURDAY STUDY GROUP
9am to 12noon
EARTH SCIENCE

31. LAST PORTFOLIO
DECEMBER 17, 2012

32. TITLE: Name: BIG IDEA THINGS I HAVE TO KNOW TO UNDERSTAND THE BIG IDEA
OTHER THINGS I COULD ALSO KNOW

33. 11/15 DAILY QUIZ 51. Where does most of the Earths weather occur in?
Trophosphere
Stratosphere
Mesophere
Thermosphere
52. What is a temperature inversion?
When the air is the thicker
When cold air is on top of warm air
When colder air is closer to the ground
When there is smog in the air
53. What is the most abundant gas in the atmosphere?
Nitrogen
Oxygen
Argon
Carbon dioxide

34. 11/15 TODAY… Stamp Homework Tonight’s Homework
FINISH WORK STARTED IN CLASS
Read Section 19-1, 19-2
Answer Section Assessment 19-2 & 19-2
Answer Worksheets 19-1 & 19-2
Complete Chapter Powerpoint Notes
Daily Quiz
Chapter 19 Powerpoint Notes 19.1

35. 11/16 TODAY… Stamp Homework Tonight’s Homework
FINISH WORK STARTED IN CLASS
Read Section 19-1, 19-2
Answer Section Assessment 19-2 & 19-2
Answer Worksheets 19-1 & 19-2
Complete Chapter Powerpoint Notes
Daily Quiz
Worksheet 19-4 and 19-4