2. LEARNINGCOMPETENCY
Describe and relate the distribution of
active volcanoes, earthquake epicenters,
and major mountain belts to Plate
Tectonic Theory
(S10ES – Ia-j-36.1)
3. SPECIFICOBJECTIVES
1. Enumerate ways to ensure disaster
preparedness during earthquakes, tsunamis,
and volcanic eruptions; and
2. Suggest ways by which one can contribute to
government efforts in reducing damage due
to earthquakes, tsunamis, and volcanic
eruption.
25. LAR G E PLATES :
AFR I CAN
ANTAR CTI C
EUR ASI AN
I ND O -AUS TR ALI AN
NOR TH AMER I CAN
SOUTH AMER I CAN
PACI FI C
S MALL PLATES :
AR ABI AN
CAR I BBEAN
COCOS
J UAN D E FUCA
NAZCA
PH I LI PPI NE
S COTI A
26. These plates fit together like the pieces of a jigsaw puzzle
and the movement ranges from less than 1 to more than 15 cm
per year. The motion of the plates over millions of years resulted
in the opening and closure of bodies of water and likewise, the
formation and disintegration of continents in the world.
PlateTectonicsTheory
27. German climatologist, Alfred Wegener, proposed
the Continental Drift Theory in his book The Origins
of Continents and Ocean in 1915. It stated that
“continents move around on Earth's surface and that
they were once joined together as a single
supercontinent. (PANGEA)”
PlateTectonicsTheory
31. a. How are earthquakes distributed on the map?
b. Where are they situated?
c. Look at your world map on page 9 and compare the earthquake
epicenters. Name the country/ies where earthquakes may not happen.
d. Why are there no earthquakes on the country/ies you mentioned?
32.
33. e. How are volcanoes distributed?
f. Where are they situated?
g. Based on the map, which country/ies will unlikely experience a
volcanic eruption?
34. h. How do you compare the location of majority of earthquake
epicenters with the location of volcanoes around the world?
35.
36. i. How will you relate the distribution of mountain ranges with the
distribution of earthquake epicenters and volcanoes?
j. What do you think is the basis of scientists in dividing Earth’s
lithosphere into several plates?
37. PlateMovements
The force that causes most of the plate movements is called
thermal convection, where heat from the Earth's interior causes
currents of hot rising magma and cooler sinking magma to flow,
moving the plates of the crust along with them. In ridge push and
slab pull, gravity is acting on the plate to cause the movement.
