How old is the oldest crust in the oceans? Why is the oldest crust located where it is?
What will be an ideal response?
The oldest crust is 180 my old, since older rock has been subducted. The oldest rock is located at passive margins (such as the east coast of the U.S.) and at subduction zones.
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The Permian extinction killed approximately ____ of all marine invertebrate species
a. 54% b. 66% c. 70% d. 83% e. 96%
The best example of a literary tradition is
A) the diffusion of television and radio broadcasts. B) the religious rituals and traditions of ancient European civilizations. C) the classification system used by Ethnologue. D) the historical documents and religious texts of the ancient Maya that were partly destroyed by Spanish conquerors. E) the variety of dialects in a language used in obscure examples of spoken poetry.
What is an elastic material?
What will be an ideal response?
Even when the supply of inorganic nutrients to the surface is high, due to for example upwelling, the absolute concentration of nutrients in the surface may still be low.
Answer the following statement true (T) or false (F)