Grade 7 science 4th quarter lesson

1. The Sea and Land
Breeze,
the ITCZ and
the Philippine
Interactions in the Atmospher

2. Solve The Mystery
What is the reason
why we have different
weather disturbances
in our country?
Solve the mystery word by guessing the hidden words
of the number codes. (Coding example 1=A, B=2…)
2-18-5-5-26-5-19
9-20-3-26
13-15-14-19-15-15-14-19
BREEZES
ITCZ
MONSOONS

3. THE SEA AND LAND
BREEZE

5. • During the day, the land heats up faster than the water in the
sea. The air above land will then become warm ahead of the air
above the sea. So the warmer air above the land will rise. The
air above the sea will then move in to replace the rising warm
air. You will then feel this moving air as a light wind—a sea
breeze.

7. • At night, the land and sea will both cool down. But the land will
lose heat faster than the water in the sea. In other words, the sea
will stay warm longer. This time the air above the sea will be
warmer than that above land. The warm air above the sea will then
rise. Air from land will move out to replace the rising warm air. This
moving air or wind from land is called a land breeze.

8. The place where
warm air rises is a
place where air
pressure is low. In
other words, the
place where warm
air is rising is a low-
pressure area.
In contrast, cold air is dense and tends to sink. The
place where cold air is sinking is a high-pressure
area.

9. ITCZ
Intertropical Convergence Zone

10. VIDEO 2

11. The ITCZ, or Inter Tropical Convergence Zone
- is a region of converging trade
winds and rising air that circles the earth near the
Equator. The rising air produces increased
cloudiness, frequent thunderstorms, and heavy
rainfall.
- Flooding and landslide because of
heavy rains also occurred

12. The ITCZ position
varies seasonally, as it
follows the sun.
It moves north in the
Northern Hemisphere
summer and south in the
Northern Hemisphere
winter.
This cause the wet and
dry seasons in the tropical
regions.

13. MONSOON originated from the Arabic word mawsin which means season. In
this natural phenomenon, there is a seasonal shift or change in direction of the
prevailing winds. As a result, these may bring change in season and weather of
a certain place.

14. The southwest
monsoon or commonly
known as Habagat gives
us warm and humid
trade winds that can
cause heavy rains In the
Philippine this happens
from June to October.

15. The northeast
monsoon or commonly
known as Amihan gives cold
and dry weather that can
cause light rains and cold
weather. . Cool and dry
northeast wind coming
from Siberia and China
blows down to Southeast
Asia. In the Philippines this
happens from December to
February.

16. Learning Task 1. Illustrating Land Breeze and Sea Breeze
Using the diagram below, draw the movement of wind
using arrows to show land breeze and sea breeze.

17. Learning Task 2: Explaining Sea and Land Breeze
1. What is the
sea breeze?
2. What is Land
breeze?
3. What is the
relationship of the
sea and land breeze
to the temperature
of an area?

18. Reflect on the images below. In your own view, how do weather disturbances affect the
lives of the Filipino people?
Guide questions:
1.What are the two seasons in the Philippines?
2.What does ITCZ stand for? What is it?
3.How does ITCZ affect our weather?

19. Direction: Arrange the following in chronological order to show the
correct process of land and sea breeze. Number it from 1-4.

20. 1. Monsoon originated from the Arabic word
_______ which means season.
2. _________ occurs when there is a sudden
seasonal shift in the direction of prevailing winds.
3. Southwest monsoon is locally known as ________
4. Amihan is a local name for ___________
5. Cumulus clouds and heavy rain are effects of
________ monsoon
Fill in the blanks to complete the statements below.