Science 5 Fourth Quarter Lesson

1. TYPHOON AND HOW IT IS FORMED

2. Write the missing letters in the boxes to complete the
words. Use the given clues as your guide.
The condition of the atmosphere at a certain time and
place

3. 2. Wind that comes from the Southwest area

4. 3. It includes all the gases on earth.

5. 4. Wind that comes from the northeast area

6. Typhoons in the Philippines are formed in the
tropic part over the Pacific Ocean and in South
China Sea usually from June to November.
Why do you think typhoons usually develop and
occur during these months?
(During these months our country receives a high
amount of heat from the sun. The warm moist air is
formed above the ocean water due to the rapid
evaporation that occurs. These lead to the
formation of typhoon.

7. Typhoons in the Philippines are formed in the
tropic part over the Pacific Ocean and in South
China Sea usually from June to November.
Why do you think typhoons usually develop and
occur during these months?
• During these months our country receives a high
amount of heat from the sun. The warm moist air
is formed above the ocean water due to the
• rapid evaporation that occurs. These lead to the
formation of typhoon.

8. TYPHOON is a weather disturbance. It is a very
large mass of whirling moist air formed in warm
seas. It brings heavy rains, strong winds, coastal
flooding and dangerous waves.
• It may be called differently depending on its
location. It is known as hurricane in the northern
hemisphere , cyclone in the western part of
the southern hemisphere, while in the eastern part
in the southern hemisphere it is known as typhoon.
• A typhoon has two parts: the eye and the eye
wall

9. HOW A TYPHOON IS FORMED
It is important to recall the behavior of a moving air to
understand how a typhoon is formed.
• When warm air rises , it produces an area of low pressure,
while the cooler and denser air produces an area of high
pressure. Since warm air is lighter, it rises into the
atmosphere while the cold air sinks
Once there is a greater difference in air pressure and
temperature between a mass of cold air (front), strong winds
occur. The wind blows from a higher pressure are (HPA) to a
low pressure area (APA)
A low pressure area then develops into a typhoon when the air
moves in a large tightening spiral around the calm center or

10. Direction.: Write TRUE if the statement describes a typhoon
and typhoon formation and FALSE if not. Write your answer
before the number. .
_____1. A typhoon can also be called storm, hurricane and
cyclone depending on its location.
_____2.Typhoon is one of the most destructive calamities
that brings heavy rain and strong winds.
_____3.Typhoon are formed in warm seas when the wind
picks up heat and moisture.
_____4. A high pressure area develops into a typhoon.
_____5. The behavior of a moving air affects the
development of typhoon.