Briefly explain why saturated clay is a very unstable slope material. What will be an ideal response?
Clay grains are platy and tend to align with their larger flat surfaces parallel to one another. Clay also
absorbs water and traps it between grains. These properties make clay very susceptible to slippage
along grain surfaces. Clay beds are frequently the slippery layer along which overlying rock units slide
downslope.
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How far does a a fault move during a large earthquake?
How far does a a fault move during a large earthquake?
- 1-5 meters
- 1-5 centimeters
- 1-5 kilometers
Projections of future world population do not typically include
A) fertility. B) mortality. C) migration. D) fertility nor mortality.
Cirrus uncinus clouds are often precursors of:
A) bad weather. B) clear skies. C) calm conditions. D) lenticular clouds.
Terrorist activities
A) are restricted to foreigners instigating violence in another country. B) are only associated with al-Qaeda. C) hold every citizen responsible and view them as culpable for the actions they oppose and therefore view citizens as legitimate targets. D) ended with the death of Osama bin Laden. E) have been reduced in frequency due to drone attacks.