Earthquakes and their causes

Earthquakes happen along a fault line. Which of the following is NOT true about faults?

• It can be found on land.

• It can be found under the sea.

• It is where fault cyclone starts.

• It is a break in the Earth’s crust

Energy from inside the Earth makes the ground move. Which of the following is the reason why there is no movement right away?

• Friction causes the delay on the movement of the ground.

• There is no movement right away because of the vibration of the rocks.

• There is no movement right away because of the bending of the rocks.

• The rapid release of energy causes the delay of the movement of the ground.

Earthquakes are common occurrence in Japan, Indonesia, and Philippines. Why is this so?

• Japan, Indonesia and Philippines are surrounded by seas.

• Japan, Indonesia and Philippines are located near the equator.

• Japan, Indonesia and Philippines are considered archipelagic countries.

• Japan, Indonesia and Philippines are found within the Pacific Ring of fire.

Which of the following refers to the place where the earthquakes start?

• Fault

• Focus

• Epicenter

• Fault plane

What do you call the spot above the focus on the surface of the Earth?

• Fault

• Crust

• Focus

• Epicenter

Scientists use different ways to describe how powerful an earthquake is. Which method refers to noting the effects of the earthquake on people, structures, and the surroundings?

• Focus

• Intensity

• Epicenter

• Magnitude

Which term refers to the released energy of an earthquake?

• Focus

• Intensity

• Epicenter

• Magnitude

Which factor keeps the rocks from slipping past each other?

• The depth of the rocks.

• The bending of the rocks.

• The arrangement of rocks.

• The roughness of the rocks.

What do you call the phenomenon that refers to the fast movement between two sides of a fault wherein the friction is overcome resulting to a sudden movement or shaking of the ground?

• Stick-slip

• Stick-bend

• Stick-shake

• Stick-vibrate

What Philippine Agency is concerned in monitoring fault movement?

• Department of Labor and Employment (DOLE)

• Department of Environment and Natural Resources (DENR)

• Philippine Institute of Volcanology and Seismology (PHILVOCS)

• Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA)