I. Answer the pretest
Copy and answer
II. Define the following
1. Earthquake
2. Fault
3. Focus or hypocenter
4. Epicenter
3. Dip-slip fault
4. Normal fault(draw it)
5. Reverse fault (draw it)
6. Strike- slip fault (draw it)
7. Tension force
8. Compression force
9. Shearing force
10. Give the meaning of the
acronym PHIVOLCS
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Answer:
1.The shaking in the Earth caused by the sudden movement of rock
2.In a normal fault, the hanging wall moves downward, relative to the footwall. A downthrown block between two normal faults dipping towards each other is a graben. An upthrown block between two normal faults dipping away from each other is a horst.
3.There are three types of dip-slip faults: normal, reverse, and thrust. The character of the movement (offset) along the fracture plane determines what kind of dip-slip fault it is. If the rock mass on a sloping fault moves downward, the it is normally called reverse if the rock above the fault moves upward.
4.epicenter.
7.
8.Compression : The weight lifter finds that his body is compressed by the weights he is holding above his head.
9.Shearing Stress is a type of stress that acts coplanar with a cross-section of material. It is also known as shear stress.
10. The Philippine Institute of Volcanology and Seismology (PHIVOLCS) is a service institute of the Department of Science and Technology (DOST) that is principally mandated to mitigate disasters that may arise from volcanic eruptions, earthquakes, tsunami and other related geotectonic phenomena.
Explanation:
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