1.
Body waves consist of the:
- P waves only
- S waves only.
- P and S waves.
- Surface waves.
Exercises 11.7 Exercises
2.
Earthquake A has a Richter magnitude of 7 as compared with earthquake B’s 6. The amount of ground motion is one measure of earthquake intensity.
- A is 10 times more intense than B.
- A is 1000 more intense than B.
- B is 0.01X as intense than A.
- Richter magnitude does not measure intensity.
3.
Where is the focus with respect to the epicenter:
- directly below the epicenter.
- in the P wave shadow zone.
- in the S wave shadow zone.
- directly above the epicenter.
4.
Which of the following could be the consequences of the underground earthquake?
- cyclone.
- tsunami.
- a landslide.
- none of the above.
5.
Which of the following statements is false?
- Most earthquakes occur at plate boundaries.
- Most earthquakes can be predicted several days in advance.
- Earthquakes can be caused by normal, reverse, and strike-slip faulting.
- P waves travel faster than both S waves and Surface waves.
6.
which one of the following is a volcanic rock?
- granite.
- basalt.
- shale.
- marble.
7.
A region where the edge of one lithospheric plate slides under the edge of another plate is
- Transform fault.
- Divergent boundary.
- Convergent boundary.
- Subduction zone.
Answer.
d.
8.
Most volcanoes are found along
- Divergent boundaries.
- Transform faults.
- Convergent boundaries.
- Hotspots.
Answer.
c.
9.
Which of the follwing is a primary cause of volcanoes, earthquake, and mountain building?
- solar radiation.
- plate tectonics.
- remanent magnetism.
- hotspots.
Answer.
b.
10.
Which type of plate boundaries exists at subduction zones?
- divergent.
- convergent.
- transform.
- reverse.
11.
Subduction zone is never located at
- midocean ridge
- isaland chain
- continental margin
- mountain range
12.
What do paleontologists study?
- Eart interior.
- Time.
- Fossils.
- Rocks.
Answer.
c.
13.
In what time spans are eras next divided?
- eons.
- epochs.
- ages.
- periods.
Answer.
d.
14.
In which era did the dinosaurs extinct?
- Cenozoic.
- Paleozoic.
- Precambrian.
- Mesozoic.
15.
When did the giant landmass Pangea split into Laurasia and Gondwana?
- Cenozoic.
- Paleozoic.
- Precambrian.
- Mesozoic.
16.
Birds are descendend from
- fish
- insects
- dinosaurs
- mammals
17.
Mammals became dominant in which era?
- Cenozoic.
- Paleozoic.
- Precambrian.
- Mesozoic.
