1. ALARMING
TYPHOONS
OBJECTIVES (DAY 1)
• DEFINE TYPHOONS
AND DISCUSS ITS
DIFFERENT TERMS.
• EXPLAIN HOW
TYPHOONS DEVELOP.
• INFER WHY THE
PHILIPPINES IS PRONE
TO TYPHOONS.
SCIENCE 8
PREPARED BY: LOUIE JANE T.
2. KEY CONCEPTS
• PRESSURE - THE CONTINUOUS PHYSICAL FORCE EXERTED
ON OR AGAINST AN OBJECT BY SOMETHING IN CONTACT
WITH IT.
• ATMOSPHERIC PRESSURE - SOMETIMES ALSO CALLED
BAROMETRIC PRESSURE, IS THE PRESSURE WITHIN THE
ATMOSPHERE OF EARTH.
• LOW PRESSURE - IS A REGION WHERE THE
ATMOSPHERIC PRESSURE IS LOWER THAN THAT OF
3. KEY CONCEPTS
• CONVERGENT WIND – THE DIFFERENCE BETWEEN
HIGH AND LOW PRESSURE SYSTEMS IN THE
ATMOSPHERE CREATING WINDS.
• HUMIDITY - A QUANTITY REPRESENTING THE
AMOUNT OF WATER VAPOR IN THE ATMOSPHERE OR
A GAS.
4. WHAT IS WEATHER?
•WEATHER IS A DAY-TO-DAY CONDITION OF
THE ATMOSPHERE AT A PARTICULAR TIME
AND PLACE.
•WEATHER TAKES PLACE AT THE
TROPOSPHERE.
•WEATHER CHANGES FROM DAY-TO-DAY
BECAUSE THE AIR IN THE ATMOSPHERE IS
10. PARTS OF A TYPHOON
• EYE -- THIS IS THE CENTER.
IT IS THE CALM PART OF
THE STORM.
• EYE WALL -- THIS PART IS
AROUND THE EYE. THIS
PART HAS THE STRONGEST
WINDS AND RAINS. THE
WINDS MAY BLOW 200
MILES PER HOUR.
• RAIN BANDS -- THESE ARE
12. DEVELOPMENT OF A TYPHOON
(TROPICAL CYCLONE)
CYCLOGENESIS
• THE PROCESS BY
WHICH A
CYCLONE
DEVELOPS AND
STRENGTHEN
13. THE FORMATION OF A TYPHOON INVOLVES
THE FOLLOWING PROCESSES:
1. EVAPORATION OF WATER AT OCEAN SURFACE TEMPERATURE
OF 26.5 DEGREE CELSIUS.
2. CONVERGENCE OF AIR MASSES OF DIFFERENT
CHARACTERISTICS.
3. HIGH HUMIDITY
4. WARM AIR RISES TOWARD THE COOLER PARTS OF THE
ATMOSPHERE, IT COOLS OFF AND THE WATER VAPOR BEGINS
TO FORM CLOUDS.
16. GENERALIZATION
•WHAT IS TYPHOON AND HOW IS IT
DIFFERENT FROM HURRICANE AND
CYCLONE?
•HOW ARE TYPHOONS FORMED?
•WHY PHILIPPINES IS PRONE TO TYPHOONS?
Editor's Notes
Video Presentation of YOLANDA.
INSERT VIDEO for MOTIVATION
Hurricane Florence (Sept. 17 2018 – North Carolina)
Cyclone Ingrid (March 2005 – Australia)
Haiyan (November 3, 2013 – Caroline Islands; tacloban City) - $4.55 billion
Let them define each. Then present a video.
PRESENT A VIDEO OF HOW TYPHOONS DEVELOP!
ITCZ, where trade winds converge and storms commonly form within the WESTERN PACIFIC. There are 20 typhoons passing through the country each year usually within the months of June to November. ITCZ – band of clods near the eqautor