LESSON IN SCIENCE 5

1. SCIENCE V
DESCRIBING THE EFFECTS OF
THE WINDS, GIVEN A CERTAIN
STORM WARNING SIGNAL
ELVIE V. MACAPAGAL
TEACHER

2. What are the different weather
disturbances?

3. (The teacher will show some pictures.)
What can you see in the pictures?
When do these things usually happen?

4. Describing the effects of the
wind, given a certain storm
warning signal.

5. PAGASA (Philippine Atmospheric
Geophysical and Astronomical Services
Administration) is responsible in giving
weather updates especially the PSWS
(Public Storm Warning Signal)

6. The PSWS is used to gauge the
strength of a typhoon as it enters the
Philippine Area of Responsibility
(PAR). It is based on the strength of
the wind of a typhoon over an area,
its circulation and projected
direction.

7. A Public Storm
Warning Signal No. 1
is characterized by
winds moving at 30-
60 kph. Intermittent
rains are also
expected in at least
36 hours.

8. A Public Storm Warning
Signal No. 2 is
characterized by winds
moving greater than 60
kph up to 120 kph
expected in at leastb24
hours.

9. Public Storm Warning
Signal # 3 is characterized
by winds moving greater
to 121 kph up to 170 kph
expected in at least 18
hours.

10. Public Storm Warning
Signal # 4 is
characterized by a very
strong typhoon with a
very strong winds of 171
kph to 220 kph and may
be expected in at least
12 hours.

11. Group Work
Group 1- Describe the effects of the wind in Public Storm Warning
Signal # 1
Group 2- Describe the effects of the wind in Public Storm Warning
Signal # 2
Group 3- Describe the effects of the wind in Public Storm Warning
Signal # 3
Group 4- Describe the effects of the wind in Public Storm Warning
Signal # 4

12. Presentation of Outputs
Groups 1 to 5 will present their work with
the guidance of the teacher.

13. Public Storm Warning Signal # 1
1. The winds may cause the twigs and
branches of small trees to be broken. It can
also tilt or uproot some bananas.
2.Houses made of light materials maybe
partially unroofed
3. Rice crops and vegetables may also be
damaged.

14. Public Storm Warning Signal # 2
1. The winds may cause coconut trees to
break or tilt even to uproot big trees.
2. More crops including rice, corn and
banana could be damaged.
3. More houses made of light materials
or old galvanized iron may be unroofed.

15. Public Storm Warning Signal # 3
1. The winds may cause many coconut trees and
almost all banana plants to be destroyed. Rice and
corn crops maybe heavily affected.
2. Majority of light material structures maybe
unroofed or destroyed.
3. There could be destruction of electrical power or
communication services.

16. Public Storm Warning Signal # 4
1. Agricultural sector may suffer great loss.
Coconut, rice and corn plantations could be
severely damaged.
2. There could be high destruction of
residential or instructional buildings.
3. Severe disruption of electrical and
communication services.

17. GENERALIZATION:
The effect of the wind depends on a
certain public storm warning signal. The
higher the typhoon warning signal is, the
greater the speed of the wind and the
damage it may cause to the environment.

18. List the effects
of the wind
during the
different public
storm warning
signals.
Effects
of the
wind
Signal #
1
Signal #
2
Signal #
3
Signal #
4
1 sea
2 houses
3 plants
4 electricity
5 rice fields

19. Write True if the statement is true and False if not.
__________ 1. Public storm warning signal # 4 can uproot big trees.
__________ 2. In Signal # 3, the sea is very calm.
__________ 3. The leaves of the trees are strongly moving in signal # 2.
__________ 4. There is a possible storm surge with signal # 4.
__________ 5. Signal # 4 can destroy houses and buildings.
__________ 6. Signal # 2 can break small twigs and can uproot banana plants
__________ 7. Buildings and houses can be destroyed in signal # 5.
__________ 8. There is a severe movement of waves in the sea during signal # 4.
__________ 9. Nipa huts or houses made of light materials can be damaged or
destroyed by signal # 2.
__________ 10. Power supply is cut during typhoon signal # 3, 4 and 5.

20. Make an advance reading
about the phases of the moon.