1. GRADE 8 SCIENCE UNIT 2:
EARTH AND SPACE
At home before an earthquake:
krisannmaeyapbonilla Subic National High
2. Grade 7
Discover that our country’s
location near the equator and
along the Ring of Fire
influences what makes up the
Philippine environment (e.g.
natural resources, climate).
3. Grade 8
Being located along the Ring of Fire,
the Philippines is prone to earthquakes.
Using models, explain how
earthquakes are generated by faults.
Try to identify faults in the
community and differentiate active
faults from inactive ones.
13. Energy from inside the Earth make
the ground move (pulling the
There is no movement friction right
away because of the FRICTION (
connecting tape). Friction held the
Once the friction is overcome, the
ground will move and the
earthquake will occur.
18. FOCUS/ HYPOCENTER
- start (origin) of the earthquake
- region where rocks break
- The point on Earth’s surface, above
- the most violent shaking of the ground
19. Use your model to show different types
of movement along a fault. How would
the surroundings be affected?
22. Waves of energy caused by sudden
breaking of rock within the Earth or an
25. P wave (PRIMARY WAVE)
- Fastest seismic wave
S wave ( SECONDARY WAVE)
- Slower than P wave.
- Do not travel thru liquid
L wave ( SURFACE WAVES)
- Travel from focus up to the epicenter
-Causes MOST of the damage during an
26. 1.When an earthquakes occurs, where
would shaking be greater? Near the
epicenter or away the epicenter?
2.Where would damage be more?
Near the epicenter or away from the
3.Where would be the intensity
higher? Near the epicenter or away
from the epicenter?
31. PHIVOLCS Earthquake Intensity
How strong is the earthquake?
I. Scarcely Perceptible - Can be felt under favorable
circumstances. Delicately balanced objects are
disturbed slightly. Still water in containers oscillates
X. Completely Devastating - Nearly all man-made structures
are destroyed. Massive landslides and liquefaction, large
scale subsidence, uplift of landforms, many ground
fissures are observed. Changes in river courses and
destructive seiches in large lakes occur. Many trees are
toppled, broken, and uprooted.
35. At home before an
Prepare an earthquake
emergency kit with non- perishable
food, bottled water, flashlights, first
aid materials, blankets, spare
glasses and other essential items
and store it where it will be easily
accessible in case of earthquake.
39. At home before an
Turn off the electricity and
Anchor heavy furniture
down to the floor.
42. Indoors during an
Go to a safe such as under the table or
desk, or wall away from windows or
Cover the back of your head and eyes.
Beware of any falling objects or
If cooking, turn off heating elements