Grade 8-Alarming Typhoon-History and Definition

For Educational Purpose only

1. ALARMING TYPHOONS Chapter 7

2. How Do Typhoons Develop A tropical cyclone is a low-pressure system that forms over tropical ocean and brings wind and thunderstorms. Tropical cyclones are called differently based on where they come from: hurricane in the Atlantic and Eastern Pacific Ocean, typhoon in the North Pacific Ocean, and cyclone in the South Pacific Ocean and Indian Ocean.

3. How Do Typhoons Develop With the right combination o conditions, typhoon develop in the following stages: Evaporation of water Formation of low-pressure area High pressure area rushes towards the low-pressure area Condensation of water vapor Creation of a tropical depression

4. How Do Typhoons Develop Conditions for Typhoon Formation Continuous Evaporation and Water Cycle Differences in Air Pressure Convergent Winds Coriolis Effect – phenomenon wherein the northern hemisphere wind rotates counterclockwise, while the southern hemisphere wind rotates clockwise.

5. How Do Typhoons Develop Parts of a Typhoon eye – calm wind eyewall – maximum wind zone, torrential rain, waves as high as 70 feet subsidence zone – strong winds, little to no precipitation, large waves outer bands – gusty and inconsistent winds, heavy and intermittent precipitation

6. Typhoon-Prone Philippines Typhoon belt – a large region in the Pacific where lots of typhoons occur; where the Philippines is located ITCZ (Intertropical Convergence Zone) – an area where the Northern and Southern Hemispheric winds converge About 20 typhoons pass through the country each year, usually within the months of June to November

7. Typhoon-Prone Philippines PAGASA (Philippine Atmospheric, Geophysical, and Astronomical Services Administration) – the government agency responsible for monitoring typhoons and weather disturbances, weather forecasting, flood control, and astronomy research. DOST – Department of Science and Technology

8. Typhoon-Prone Philippines PAR – Philippine Area of Responsibility TCWS (Tropical Cyclone Warning Signal) – provides information about the incoming tropical cyclone, its strength and speed Color-Coded Rainfall Warning Signal – provides information about incoming rainfalls and the necessary responses to be taken by the public

9. Typhoon-Prone Philippines

10. Typhoon-Prone Philippines

11. How Landforms and Bodies of Water Affect Typhoons Orography – study of formation and topography of mountains and hills Places near a sea with mountain and hills experience the orographic effect. Most of the rain that forms can roll down on the seaside, and only a little or none on the side away from the sea.

12. How Landforms and Bodies of Water Affect Typhoons Ocean factors that affect the intensity of a typhoon are the surface temperature before the storm and the temperature difference between the surface and subsurface waters.

13. Reference/s Exploring Life Through Science 8 (pp. 108-114)