The oldest rocks on the ocean floors are about ________ years in age.
A. 2 billion
B. 200 million
C. 4.5 billion
D. 50,000
E. 45 million
Answer: B
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Which statement best describes how patterns in ocean floor heat flow from a mid-ocean ridge vary as one moves away from the ridge in any direction? Which statement best describes how patterns in ocean floor heat flow from a mid-ocean ridge vary as one moves away from the ridge in any direction?
- Heat flow decreases
- Heat flow stays essentially the same
- Heat flow increases
Which of these countries has the highest per capita water footprint?
A. U.S. B. Russia C. China D. Canada
Individual retirees who travel south for the winter and return north during the summer are evidence of two types of migration patterns. What are they?
What will be an ideal response?
Evapotranspiration has no significant effect on the hydrologic cycle
Indicate whether the statement is true or false.