Briefly explain how deep trenches form
What will be an ideal response?
Bending of the downgoing (subducting) oceanic plate creates a roughly v-shaped gap near the surface between the two lithospheric plates. This gap or trench fills with sediments scraped off the downgoing plate and material eroded from the volcanic arc on the overriding plate.
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Which of the following is a property of light?
A. Its energy comes in packets of uniform size. B. It is a wave. C. It is a particle. D. all of the above E. none of the above
A geologist observing a break in a rock formation consisting of sedimentary layers concludes that the layers were displaced as a result of fault movement. Which principle is described here?
A) the principle of inclusions B) the principle of superposition C) the principle of cross-cutting relationships D) the principle of original horizontality
Global warming combined with increasing carbon dioxide amounts may lead to further global warming. This is an example of a
A) negative feedback B) positive feedback C) neutral feedback D) adiabatic feedback
Volcanoes that have the most impact on global climate seem to be those rich in:
a. nitrogen b. water vapor c. carbon dioxide d. sulfur e. oxygen