The upper mantle consists of ________.
A. sedimentary rocks
B. basalt
C. ultramafic rocks
D. metamorphic rocks
E. granite
Answer: C
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The Panthalassa Ocean eventually became the present-day _________ Ocean
a. Atlantic c. Arctic b. Indian
____________ are photosynthetic plankton with a rigid cell wall composed of silica called a(n) ____________. Fill in the blank(s) with the appropriate word(s)
The largest proportion of travel by households is related to shopping trips
Indicate whether the statement is true or false
The North American Manufacturing Belt grew rapidly in the late 19th Century due to
A) its access to raw materials. B) its access to foreign capital. C) its ample labor supply. D) a transportation system that allowed easy movement of bulky and heavy materials. E) all of the above.