5
Describing the Condition
of the Environment
Before, During and After a
Typhoon
Module in Science 5.Week 3
Fourth Quarter
Photo was taken fromwww.google.com.images
HAZEL L. TAMAYO
Developer
Department of Education. SDO- IFUGAO
Republic of the Philippines
Department of Education
Cordillera Administrative Region
Schools Division Office- Ifugao
Published by
Learning Resource Management System
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(2020)
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this material for commercial purposes and profit.
Hazel L. Tamayo
Developer
WHAT I KNOW
Find out how much you already know about the topic. Choose the correct answer
and write the letter of your answer in a separate sheet. Please answer all items.
1. Which of the following is an environmental condition before a typhoon?
A. There is a heavy rain accompanied by strong wind.
B. The clouds in the sky are high and dark.
C. The sky is clear and the sun brightly shines.
D. All of the above
2. Which of the following is a condition of the environment during a typhoon?
A. The humidity is high.
B. Many people are moved to evacuation areas.
C. Floods and landslides happen in some places.
D. All of the above.
3. Which of the following is observed in the environment after a typhoon?
A. Some people are affected by diseases such as influenza and dengue.
B. The wind blows gently and there are scattered rain showers.
C. Big waves in the coasts of oceans are observed.
D. All of the above.
4. In what stage of a typhoon where flash floods and landslides happen?
A. after
B. before
C. during
D. No answer
5. The following are observed before a typhoon, except one. Which among the
following is an exception?
A. Big clouds are risen to the sky.
B. The relative humidity is high.
C. The air is dry and cold.
D. There is strong wind and heavy rain.
6. Which is not observed during a typhoon?
A. Rescue and relief operations are ongoing.
B. Flash floods may occur due to heavy rain.
C. There are high ocean tides and storm surge.
D. Trees and crops may be tilted or uprooted.
7. After a typhoon, what is usually observed in the surrounding?
A. Many people are brought to evacuation centers.
B. Some areas are flooded and devastated.
C. People may suffer from water-borne diseases.
D. All of the above
8. In the Philippines, there is an agency that is responsible for observing and
forecasting weather conditions. What is the name of that agency?
A. DENR
B. DEP ED
C. DSWD
D. PAGASA
9. What could possibly happen if the storm signal is Number 2?
A. Rice and corn plantations may be severely affected.
B. Few big trees may be uprooted.
C. Roof of buildings may be blown away.
D. Many coconut trees may be devastated.
10. During a typhoon signal number 3, what usually happens to nipa and cogon
houses?
A. The roof will remain as it is.
B. It will be slightly damaged
C. It will be unroofed or blown by the wind.
D. Nothing will happen to the nipa or cogon house.
11. What do people call a signal number 5 typhoon?
A. Mega Typhoon B. Normal Typhoon
C. Super Typhoon D. None
12. Elementary classes are suspended in what signal of storm?
A. PSWS # 1
B. PSWS # 2
C. PSWS # 3
D. PSWS #4
13. How fast does the wind move when it is storm signal number 1?
A. 20-30 kph
B. 30-60 kph
C. 40 – 60 kph
D. 50-70 kph
14. How do people know if there is a typhoon coming?
A. By observing the environment.
B. By listening or watching to weather forecasts.
C. By using special gadgets.
D. All of the above
15. Why is it important to observe the weather condition before, after and during a
typhoon?
A. To be able to know if there is unforeseen weather disturbance.
B. To be prepared for the possible effects of the typhoon.
C. To avoid much devastation brought by a typhoon
D. All of the above
Describing the Condition of the Environment Before,
During and After a Typhoon
WHAT IS IN
Direction: To recall your previous lesson, answer the matching type regarding weather
conditions. Read the words in column A and match the meaning from column B. Write
your answer on your answer sheet.
Column A
Column B
1. weather disturbance
4. weather forecast
a. It is a condition of the atmosphere
for a short period of time.
b. Another terminology for typhoon.
c. It refers to any disruption of the atmosphere’s
stable condition.
d. The usual weather condition in a place.
5. tropical cyclone
e. It refers to predicting the conditions of
2. weather
3. climate
the atmosphere for a given place and time.
WHAT IS NEW?
Direction: There are 10 hidden words that are related to weather. All you have to do is
find them by connecting the letter horizontally, vertically and even diagonally. List the
words that you find on your answer sheet and compare them later on the answer key.
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WHAT IS IT
Were you able to look for the hidden words? Maybe some of the words are familiar
and some are not. You will be able to encounter and understand them as you go
through this lesson.
A. Before a typhoon
Before a tropical cyclone or commonly known as typhoon, high clouds are
observed in the sky. The air is dry and cold since most of the warm air has
already risen. The relative humidity or moistness of air is high. The wind blows
gently and scattered rain showers may occur.
B. During a Tropical Cyclone or Typhoon
During a typhoon, the sky is dark and cloudy. Heavy rainfall accompanied
by strong winds occurs. Big waves are also observed near the coast. When
these waves become high due to high ocean tides, a storm surge occurs.
Flash floods may also occur due to heavy rainfall. Landslides may be
triggered by flash floods and heavy rains. Some trees and crops may be
uprooted because of strong winds.
In order to determine how strong the typhoon is, the Philippine Atmospheric
Geophysical and Astronomical Services Administration (PAGASA) issues
Public Storm Warning Signals (PSWS).
The picture below shows the environmental condition during a typhoon.
The table below shows the strength of typhoon entering the Philippine area
of responsibility (PAR), as well as the impact of winds, and the precautionary
measures which should be done.
PSWS
#
1
Environmental Condition



A tropical cyclone will affect the
locality
Winds move at a speed of 3060kph may be expected in at
least 36 hours.
Continual (on and off) rain is
expected within 36 hours.
Impact of the Wind





2


A tropical cyclone will affect the
locality.
Winds move at a speed of 61120kph and may be expected
in at least 24 hours.








3


A tropical cyclone will affect the
locality.
Winds move at a speed of 121170kph and may be expected
in at least 18 hours.





Branches of small trees may be
broken.
Some banana plants may be
tilted.
Some houses of light materials
(nipa and cogon) may be
partially unroofed.
Only very light damage to the
exposed community.
People are advised to listen to
the latest weather forecast of
PAGASA.
Some coconut trees may be
tilted or broken.
Few big trees may be broken
Many banana plantations may
be drowned.
Rice and corn may be
adversely affected.
Large number of nipa and
cogon houses may be partially
or totally unroofed.
Some galvanized iron roofs
may be peeled off.
In general, the winds may bring
moderate damage to the
exposed community.
Outdoor activities of children
should be postponed.
Many coconut trees may be
broken or destroyed.
Almost all banana plants may
be downed and a large number
of trees may be uprooted.
Majority of houses made in light
materials may be unroofed or
destroyed.
There may be widespread
disruption of electrical power
supply and communication
services.
In general, moderate to heavy
damage may be experienced
particularly in the agricultural
and industrial sectors

4


A very intense typhoon will
affect the locality.
Winds move at a speed of 171220 kph and may be expected
in at least 12 hours.







5


A super typhoon will affect the
locality.
Winds move at a speed of
220kph or above is expected in
at least 12 hours.





Classes in all levels should be
suspended.
Coconut plantations may suffer
extensive damage.
Many large trees may be
uprooted
Rice and corn plantations may
suffer severe damages
Most
residential
and
institutional buildings made
from
mixed
construction
materials may be severely
damaged.
Electrical
power
and
communication services may
be severely disrupted.
Overall, damage to affected
communities can be very
heavy.
Disaster coordinators are fully
alert to respond emergencies.
Widespread damage to highrisk structures.
Complete roof failure on many
residences
and
industrial
buildings.
Electrical power distribution
and communication services
severely disrupted.
Most plants and tall trees are
broken, uprooted or defoliated.
All kinds of travel and activities
should be cancelled.
C. After a Typhoon
When a tropical cyclone is over, the sun becomes visible and the sky
becomes clearer. There might be scattered rain showers. Some areas may be
still flooded and recovering from the typhoon. Rescue and relief operations are
also on-going. There might be outbreak of water-borne diseases, influenza, and
dengue.
The picture below shows the environmental condition after a super typhoon.
You have read the conditions of the environment before, during and after a
typhoon, now, answer the following questions:
1. What do we observe in our environment before a typhoon?
2. What about during a typhoon?
3. Just after a typhoon, why is it that it’s not safe for children to go to school?
4. As residents, what are the things we should do to stay safe before, during and
after a typhoon?
5. Why is it important to observe weather condition?
WHAT’S MORE
You described the environmental condition before, during and after a tropical
cyclone in the above discussion. Now, you are going to check your understanding of
the lessons you have learned.
Activity 1
Direction: Study the pictures.Match the photo to its correct description and write the
letter of your choice on your answer sheet.
Column A
1.
2.
Column B
A. This environmental
condition happens
after a tropical cyclone.
There are casualties
and rescue operations
are being done.
.
B. This condition happens
during a super typhoon.
Some roof are blown halted
by the strong wind .
.
C.This condition happens after
a typhoon. People move to
evacuation centers because
their houses or residences are
flooded.
3.
.
D. This condition happens
after a typhoon.
People,especially children in
the exposed community suffer
from water- borne diseases.
.
4.
E. This situation happens
before a typhoon. Dark sky is
observed and it seems it is
about to rain.
5.
Assessment 1
Direction: Study each photo then identify the storm signal that affected the area
whether it is storm signal #1,#2,#3,# 4 or signal #5.
Write your answer on your answer sheet.
_______1.
______4.
________2.
______5.
________3.
Activity 2
Directions: List down the effects of wind during the different storm warning
signals. Some answers were given for your reference. Write your
answers on your answer sheet.
Effects of
Wind to
Signal 1
Signal 2
Signal 3
Many
nipa
and
cogon
1.________
2._______
houses may
be partially or
totally
unroofed.
PLANTS
all
4.________ 5_________ Almost
Banana plants
and may be
downed and a
large number
or trees may
be uprooted.
ELECTRICITY There will be 8________
9._________
very light or
no damage
at all on
electricity.
HOUSES
Signal 4
Signal 5
Roof of many
3.________ industrial
buildings will
be completely
blown away.
6._______
7.________
Electrical
10.________
power
services
may
be
severely
disrupted
WHAT I HAVE LEARNED
Direction: Fill in the blanks to make each sentence correct. Write your answer on
your answer sheet. Choose the letter of your choice from the word box.
A.Rainfall
B. Landslides
F. Storm
G. Over
C. Evacuation Area
H. Visible I. Typhoon
D. gently E.During
J. Strength
Before a tropical cyclone or commonly known as__1__, high clouds are
observed in the sky. The wind blows __2__and scattered rain showers may
occur.
____3__a typhoon, the sky is dark and cloudy. Heavy __4___ accompanied by
strong winds occurs. In the ocean, when these waves become high due to high
ocean tides, a ___5__surge occurs. ____6___may also occur due to heavy
rainfall.
In order to determine the ___7___, the Philippine Atmospheric Geophysical
and Astronomical Services Administration (PAGASA) issues Public Storm
Warning Signals (PSWS).
When a tropical cyclone is__8__, the sun becomes ___9__and the sky
becomes clearer. If a certain area is severely devastated, many residents are
sick and staying in____10_.
WHAT I CAN DO
How did you find the preceding activities? Were they easy? I’m sure they were.
In the next activity, you are going to apply the lessons you have learned in real life
situations.
Direction: Put a check mark (/) to the sentence that stating correct preparedness
before, during and after a typhoon and put a wrong mark (x) if it is
incorrect. Write your answer on your answer sheet.
______1. Mang Jose is a farmer. He observed the sky is dark and seems it is about
to rain. The wind is moist and cold. He, then turned on his radio and listened for
weather forecasts.
______2. Mila is a Kindergarten pupil. They do not have class because their area is
affected by the Typhoon Ompong with signal number 1. There was little rain, so she
went to play with their neighbour.
______3. The Dulnuan family planned to hold a birthday celebration in a resort this
Saturday. However, the weather forecaster announced that a Typhoon is coming
and will be affecting the area where the Dulnuan family lives. So, they postponed
their planned family occasion.
______4. Bugan’s family lives in the middle of their field. They do not have TV or
radio or phone to get latest update about Typhoon. One Monday, she woke up early
to prepare for school. But she noticed that there was a heavy rain and strong wind.
She looked around and realized that there is a typhoon. So, she decided not to go to
school.
______5. Archie and Karyl are in Grade V. They live far from school. When it is rainy
during schooldays, they always think there is typhoon. Therefore, they always get
absent from class.
Assessment
Now that you have a wider understanding of the topic, you are now ready to
answer the following assessment.
Direction: Read each statement carefully. Choose the letter of the correct answer
and write it on your answer sheet.
1. The following are observed before a typhoon, except one. Which among the
following is an exception?
A. Big clouds are risen to the sky.
B. The relative humidity is high.
C. The air is dry and cold.
D. There is strong wind and heavy rain.
2. Which is not observed during a typhoon?
A. Rescue and relief operations are ongoing.
B. Flash floods may occur due to heavy rain.
C. There are high ocean tides and storm surge.
D. Trees and crops may be tilted or uprooted.
3. Which of the following is observed in the environment after a typhoon?
A. Some people are affected by diseases such as influenza and dengue.
B. The wind blows gently and there are scattered rain showers.
C. Big waves in the coasts of oceans are observed.
D. All of the above.
4. Which of the following is a condition of the environment during a typhoon?
A. The humidity is high.
B. Many people are moved to evacuation areas.
C. Floods and landslides happen in some places.
D. All of the above.
5. After a typhoon, what is usually observed in the surrounding?
A. Many people are brought to evacuation centers.
B. Some areas are flooded and devastated.
C. People may suffer from water-borne diseases.
D. All of the above
6. Which of the following is an environmental condition before a typhoon?
A. There is a heavy rain accompanied by strong wind.
B. The clouds in the sky are high and dark.
C. The sky is clear and the sun brightly shines.
D. All of the above
7. In what stage of a typhoon where flash floods and landslides happen?
A. After
B. Before
C. During
D. No answer
8. What do people call a signal number 5 typhoon?
A. Mega Typhoon B. Normal Typhoon
C. Super Typhoon D. None
9. Why is it important to observe the weather condition before, after and during a
typhoon?
A. To be able to know if there is unforeseen weather disturbance.
B. To be prepared for the possible effects of the typhoon.
C. To avoid much devastation brought by a typhoon
D. All of the above
10. How fast does the wind move when it is storm signal number 1?
A. 20-30 kph
B. 30-60 kph
C. 40 – 60 kph D. 50-70 kph
11. In the Philippines, there is an agency that is responsible for observing and
forecasting weather conditions. What is the name of that agency?
A. DENR
B. DEP ED
C. DSWD
D. PAGASA
12. How do people know if there is a typhoon coming?
A. By observing the environment.
B. By listening or watching to weather forecasts.
C. By using special gadgets.
D. All of the above
13. During a typhoon signal number 3, what usually happens to nipa and cogon
houses?
A. The roof will remain as it is.
B. It will be slightly damaged
C. It will be unroofed or blown by the wind.
D. Nothing will happen to the nipa or cogon house
14. Elementary classes are suspended in what signal of storm?
B. PSWS # 1
B. PSWS # 2
C. PSWS # 3
D. PSWS #4
15. What could possibly happen if the storm signal is Number 2?
A. Rice and corn plantations may be severely affected.
B. Few big trees may be uprooted.
C. Roof of buildings may be blown away.
D. Many coconut trees may be devastated
Additional Activities
This is an activity that will enhance your knowledge about the lesson.
Direction: Interview your grandparents on what are their ancient ways of knowing or
observing that a typhoon is coming.
Write at least 3-5 sentences.
Pre-assessment
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
B
C
A
C
D
A
D
D
B
C
C
B
B
D
D
What’s In
1.
2.
3.
4.
5.
C
A
D
E
B
What’s New
(In any order)
1. wind
2.rain
3. hurricane
4. landslide
5.tropical
6.waves
7.ocean
8.cloud
9.coast
10.storm
Activity 2
1. PSWS # 2
2. PSWS # 4
3. PSWS # 3
4. PSWS # 5
5. PSWS #1
What I can Do
1. /
2. X
3. /
4. /
5. X
Post Assessment
2. A
1.Answer may vary
2. Answer may vary
3. Answer may vary
4. Answer may vary
5. Answer may vary
6. Answer may vary
7. Answer may vary
8. Answer may vary
9. Answer may vary
10. Answer may vary
1. D
Activity 3
3. D
4. C
5. D
6. B
7. C
8. C
What I Have Learned
1. I
2. D
3. E
4 A
5F
6. B
7. J
8. G
9. H
10. C
9. D
10. B
11. D
12. D
13. C
14. B
15. C
What’s More
Activity 1
1. C
2. E
3. A
4. D
5. B
Answer Key
References
Sarte, Evelyn T., Garcia, Ednaliza R., Lopez, Eliza A., dela Cruz, Mary Jean G., and
Arradaza, Harold A..GOP Textbook . Science Beyond Borders 5. Araneta Avenue,
Quezon City, Philippines. Vibal Group, Inc. 2016
Online References
 www.google.com
 http://www.powtoon.com/youtube/
 http://www.google.com/imgresphippine-typhoon.
For inquiries or feedback, please write or call:
Department of Education – SDO-Ifugao
Address: Lagawe, Ifugao
Contact Number: 09776045594
Email Address: deped.ifugao@deped.gov.ph