Crustal Deformation & Mountain Building
The mountain system formed by the collision of the Indian and Eurasian plates.
Answer: Himalayas
Point inside the Earth where an earthquake originates.
Answer: Focus
The continuous movement of water through Earth’s systems.
Answer: Hydrologic cycle
A seismic wave that cannot travel through liquids.
Answer: S-wave (Secondary wave)
Instrument used to detect and record earthquakes.
Answer: Seismograph
The principle stating that Earth's crust floats in gravitational balance on the mantle.
Answer: Isostasy
The layer that causes S-waves to stop and P-waves to bend.
Answer: Outer core
Underground layer that stores and transmits groundwater.
Answer: Aquifer
A deep, U-shaped valley formed by stream erosion.
Answer: Canyon
The bending of rock layers caused by compressional stress.
Answer: Folding
The large-scale process that builds mountains.
Answer: Orogeny
Scale that measures earthquake intensity based on effects.
Answer: Modified Mercalli Intensity Scale
Ground collapse caused by overuse of groundwater.
Answer: Subsidence
Material through which water moves easily.
Answer: Permeable material
An upward-arching fold in rock layers.
Answer: Anticline
A broad, flat, uplifted area of the crust.
Answer: Plateau
The boundary between Earth's crust and mantle.
Answer: Mohorovičić discontinuity (Moho)
A layer of rock or sediment that does not allow water to pass through easily.
Answer: Aquitard
An isolated, upward bulge in Earth’s crust.
Answer: Dome
The process by which water enters the ground to become groundwater.
Answer: Infiltration
The slow vertical rise of Earth’s crust after removal of a weight, like a glacier.
Answer: Isostatic rebound
The boundary within Earth where the velocity of P-waves drops abruptly due to entry into a liquid layer.
Answer: Gutenberg Discontinuity
The process by which groundwater returns to the surface, such as springs or wells.
Answer: Discharge
Type of well that flows without pumping.
Answer: Artesian well
This Philippine government agency monitors seismic activity and issues earthquake bulletins.
Answer: PHIVOLCS (Philippine Institute of Volcanology and Seismology)