1. TN Standard: Explain how relationships between the movement and interactions of air masses, high and low pressure systems, and frontal boundaries result in weather conditions and severe storms.
Observe the picture….
Why do you think it was
chosen to represent
FRONTS?
Discuss with your
Neighbor!
FRONTS

2. Weather Fronts Videos Answer: DENSITY
What do you think is the main
reason two air masses
don’t just blend their
temperatures into one
new air mass?
Answer: DENSITY
Write at least TWO FACTS from the videos
you didn’t know on your notes page!

3. Fronts
Air masses that form from different areas often do not mix because they have different densities.
Warm air is less dense than cold air. When two air masses meet, warm air generally rises.
The area in which two types of air masses meet is called a FRONT.

4. Four Kinds of Fronts These are the symbols to
represent different types
of Fronts on a weather map.

5. COLD FRONT A COLD FRONT forms when...
cold air moves under warm air pushes the less dense warm air up
Weather that cold fronts bring….
thunderstorms
heavy rain
snow
cooler/drier air mass
behind it

6. WARM FRONT A WARM FRONT forms when...
warm air moves over cold denser air
warm air gradually replaces cold
Weather that warm fronts bring…
drizzly rain
followed by clear and warm weather
(Remember “sizzle brings drizzle”)

7. OCCLUDED FRONT An OCCLUDED FRONT forms when...
a warm air mass is caught
between two colder air masses
the coldest air mass moves under
and pushes up the warm air mass
coldest of the two air masses then pushes the less dense cold air mass up
Weather that occluded fronts bring...
large amounts of rain or snow
cool temperatures

8. Occluded Front

9. STATIONARY FRONT A stationary front forms when...
Cold air mass meets warm air mass
Neither has enough force to lift the
warm air mass over the cold air mass
Fronts “stay” separated because
not enough wind to keep air masses pushing
against each other
Stationary fronts bring...
many days of cloudy & wet weather

10. Stationary Front

11. Turn to your neighbor and…..
List and describe the four
types of fronts
AND
the type of weather they bring

12. Cold Front
Occluded Front
Warm Front
Stationary Front

13. AND NOW FOR SOME CREATIVE THINKING ….
YOU WILL CREATE FOUR CARTOONS THAT REPRESENT THE RELATIONSHIP/INTERACTIONS OF WARM AND COLD AIR MASSES WHEN THEY FORM THE FOUR TYPES OF FRONTS.
BE CREATIVE! EACH AIR MASS MUST HAVE A CAPTION
COLOR APPROPRIATELY BLUE (COLD) OR RED (WARM)
INCLUDE FRONT FLAG SYMBOLS
DESCRIBE THE TYPE OF WEATHER THEY BRING