Midterm #2 TopHat Questions Flashcards
1
Q
Soil liquefaction occurs due to severe shaking
A
- increasing water pressure in soils which breaks bonds between grains
2
Q
An increase of 2 in magnitude leads to a ____ times increase in shaking.
A
- 100
3
Q
A high temperature material has ___ viscosity than the same material at lower temperature.
A
- lower
4
Q
Which of these materials are found at the surface of the earth?
A
- lava
- volcanic rock
5
Q
Which causes the most explosive volcanic eruption/
A
- Rhyolite magma of low viscosity and high volatile content
6
Q
Lahars are
A
- mud flows caused by volcanic eruptions
7
Q
The majority of Earth’s volcanic activity occurs in which of the following tectonic settings?
A
- spreading centres
8
Q
The most active Cascades volcanoes in the last 4000 years is
A
- St. Helen’s
9
Q
Volcanoes in Canada result from
A
- rifting
- a hot spot
- subduction
10
Q
Earthquakes generate tsunamis during the
A
- co-seismic period
11
Q
Tsunamis can be caused by
A
- meteor impacts
- earthquakes
- volcanoes
- landslides
12
Q
Near the coast, tsunami waves
A
- decrease in velocity and increase in amplitutde
13
Q
The wavelength of a tsunami is ___ relative to ocean water depth.
A
- long
14
Q
Particle motion for Daylight wave
A
- retrogade elliptic
15
Q
Particle motion for tsunami
A
- prograde elliptic
