Samples from the seafloor around the Mid-Atlantic Ridge and the East Pacific Rise show that both areas have been creating new material in the last five million years
Samples from the East Pacific Rise show the five-million-year-old seafloor is three times as wide as similarly aged material from the Mid-Atlantic Ridge. What does this say about the rate of seafloor spreading in the East Pacific?
A) The seafloor at both sites is growing at the same rate.
B) The seafloor at the East Pacific Rise is growing more slowly.
C) The seafloor at the Mid-Atlantic is growing more quickly.
D) The seafloor at the Mid-Atlantic is growing more slowly.
Answer: D
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A. reclusive B. obtrusive C. intrusive D. preclusive E. extrusive
Our world ocean can be divided into four principal oceans plus an additional ocean, based on the ________ of the ocean basins and the ________ of the continents
A) shape; position B) position; latitude C) size; shape D) depth; elevation
Satellite data now allow direct measurement of the rates of plate movement, even though it is slow.
Answer the following statement true (T) or false (F)
Calculate the average population density of the cities on the graph. Does the city that has average population density also have average carbon emissions?
A) Yes, average population density correlates with average carbon emissions. B) No, carbon emissions are higher than average in the city with average population density. C) No, carbon emissions are actually lower than average in the city with average density. D) Yes, average population density causes average carbon emissions.