Describe three factors that can act as triggers for mass wasting events
What will be an ideal response?
Answer: Answers will vary, but a correct answer will include three of the following:
(a) addition of water, perhaps by heavy rains, which reduces particle-to-particle cohesion, lubricates, and adds weight to the slope, (b) oversteepening of a slope, (c) removal of vegetation by forest fires or intentional human clearing, which reduces or eliminates the "net-like" effect of roots holding soils in place, or (d) the land may be shaken by an earthquake. There are also landslides without triggers.
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The level of free convection is where:
A) moisture content in the atmosphere becomes too heavy to lift. B) air becomes negatively buoyant and rises by itself. C) air becomes positively buoyant and rises by itself. D) usually occurs only early in the morning.
Metamorphism takes place ____
A)as country rock is melted by contact with magma B)while rocks remain solid C)without high temperatures as long as rocks are buried at great depth D)without high pressure, as long as high temperatures are present E)only with fluid activity
Using the analemma, find the declination of the Sun on the following dates; indicate whether the declination is north latitude or south latitude.
Date (a) January 10 (b) March 6 (c) May 9 (d) November 18
The primary destination of electronic waste exported from Europe and North America is
A) India and China. B) Europe and North America. C) Africa. D) South America.