The document discusses earthquakes, including what causes them, different types of faults, and some of the deadliest earthquakes in Philippine history. Earthquakes are caused by a sudden slip along a fault in the earth's crust that releases built-up energy. There are two main types of earthquakes - tectonic, caused by movement along faults, and volcanic, caused by activity below active volcanoes. Geologists cannot yet precisely predict earthquakes because they do not fully understand conditions deep underground where quakes start and lack certainty around when and where stored stress will be released.

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2. Earthquake
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MA’AMJEN

3. Using models or
illustrations, explain how
movement along faults
generate earthquakes
(S8ES-IIa14)
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4. • Identify the three different types of
faults;
• Describe the movement that occurs in
each type of fault; and
• Explain how movement along faults
generate earthquake.
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5. Five deadliest tremors in Philippine
Earthquake History
BOHOL EARTHQUAKE (2013)
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6. Five deadliest tremors in Philippines
Earthquake History
MINDORO EARTHQUAKE (1994)
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7. Five deadliest tremors in Philippines
Earthquake History
LUZON EARTHQUAKE (1990)
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8. Five deadliest tremors in Philippines
Earthquake History
MORO GULF EARTHQUAKE (1976)
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9. Five deadliest tremors in Philippines
Earthquake History
CASIGURAN EARTHQUAKE (1968)
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11. What is an Earthquake?
Is a sudden shaking of the ground caused by a sudden slip on
a fault.
Energy from the earth’s interior makes the ground move.
Friction holds the rocks together but when there is so much
stress, the friction is overcome, and there is a sudden move in
the ground that causes an earthquake.
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12. Two types of earthquakes
1.Tectonic Earthquakes- are produced by sudden
movement along faults and plate boundaries.
2.Volcanic Earthquakes- Earthquakes induced by rising
lava or magma beneath active volcanoes
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14. WHY DO GEOLOGISTS CANNOT YET
PREDICT EARTHQUAKES?
Geologists don’t have enough understanding about the
condition at the depths where quake starts and
spreads.
They cant be sure when and where stress will be
released along a fault.
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16. SUMMARY
An earthquake is caused when rocks suddenly move in the
earth’s crust. The tectonic plates are always slowly moving, but
they get stuck at their edges. When they get stuck, they build up
a huge amount of energy. Then they move suddenly, releasing
this energy in waves that travel through the earth’s crust and
cause the shaking that we feel.
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17. TRUE OR FALSE?
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18. Philippines is located
along the Pacific Ring of
Fire.
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19. Earthquakes are not
associated with faults.
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20. A fault is a break in the Earth’s
crust, and along the break, NO
movement has taken place.
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21. Energy form inside the Earth
exerts a force on the rocks.
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22. When a portion of the land
sinks, a mountain is formed.
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23. ACTIVITY #2: How Well Do You Know Me?
DIRECTION: WRITE YOUR ANSWER IN A ½ SHEET OF
PAPER.
1.What is earthquake?
2.How do earthquakes occur?
3.Can we predict earthquakes? Why or why not?
4.Can people cause earthquakes? Why or why not?
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24. SHORT QUIZ
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Answer at the back of your ½ sheet of paper.
1.Is a sudden shaking of the ground caused by a
sudden slip on a fault.
a.Earthquake
b.Faults
c. Waves
d.Friction

25. SHORT QUIZ
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2. It holds the rocks together but when there is
so much stress there is a sudden shaking on
the ground that causes earthquake.
a.Earthquake
b.Faults
c.Waves
d.Friction

26. SHORT QUIZ
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3. A fracture in the rocks that make up the
earth’s crust.
a.Earthquake
b.Faults
c.Waves
d.Friction

27. SHORT QUIZ
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4. Which of the following can be triggered by an
earthquake?
a.Intense ground shaking
b.Landslide
c. Tsunami
d.All of the above

28. SHORT QUIZ
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5. Why do geologists cannot yet predict
earthquakes?
a.There are too many faults to monitor.
b.They can’t be sure when and where stress will be
released along a fault.
c. They need to know where all past earthquakes
occurred.
d.They have too much data.

29. ANSWER
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1.A
2.D
3.B
4.D
5.B

30. ASSIGNMENT
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Let us sum up what you have learned in this
lesson through a journal. Write your learnings on
your notebook.
I have learned that…____________________
I realized that…________________________
I concluded that…______________________

31. v
“Now every time I witness a strong
person. I want to know what darkness
did you conquer in your story?
Mountains do not rise without
earthquakes”
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