The document discusses the four seasons - spring, summer, autumn, and winter. It explains that the seasons are caused by the tilt of the Earth's axis at 23.5 degrees and its revolution around the sun. As the Earth revolves, different parts of the globe are tilted toward or away from the sun, causing seasonal changes. The northern hemisphere experiences summer when its top half is tilted toward the sun, and winter when the bottom half is tilted toward the sun. The Philippines has two seasons - the wet season from June to October and the dry season from November to May.

2. s rp i n g

3. s u m m e r

4. a nu t u m

5. w i n t e r

6. SEASONS

7. The Four Seasons

8. SPRING

9. SUMMER

10. AUTUMN

11. WINTER

12. AXIS
23.5º

13. Let us observe!

15. SUMMER
SPRING
WINTER
FALL

16. 1 Rotation = 24 hours or 1 day
1 Revolution = 365 days or 1 year

17. 2 Seasons in the
Philippines

18. WET SEASON
JUNE-OCTOBER

19. DRY SEASON
NOVEMBER-MAY

20. IDENTIFY!

25. QUIZ TIME!

26. 1. What is the reason why season
changes?
a. Because of the tilt of the Earth on its
axis.
b. Because of the distance of the Earth
from the Sun.
c. Because of the rotation of the Earth.
d. Because of the rotation of the moon
around the Earth.

27. 2. Earth is tilted at 23.5˚, what is
its effect in Earth?
a. Change in Climate
b. Change in Weather
c. Change in Season
d. Change in Tides

28. 3. When the upper part of the Earth
is tilted towards the Sun, what is
the season in the Northern
Hemisphere?
a. Summer
b. Winter
c. Fall
d. Spring

29. 4. When the lower part of the Earth
is tilted towards the Sun, what is the
season in the Northern Hemisphere?
a. Summer
b. Winter
c. Fall
d. Spring

30. 5. It is the season in the
Philippines which occur from June-
October.
a. Summer
b. Dry
c. Fall
d. Wet

31. References:
• Science: Learner’s Material
(DepEd, Module 3)
• Focus on Earth Science
California Edition ( Padilla, Et,Al, pp
550-555)