Relative dating of geologic events was not possible before the discovery of radioactivity in the late 19th century
a. True
b. False
False
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The continental edge between locations 4 and 5 is probably
A) a divergent boundary.
B) a convergent boundary.
C) an active continental rift.
D) where two plates are colliding.
E) not a plate boundary.
Suppose you are outside in very cold temperatures, wearing a winter coat that is quite effective at
keeping you warm. Which of the following is true? a. The coat is the source of the heat that keeps you warm. b. Your body generates the heat that keeps you warm. c. The coat prevents your body’s heat from escaping to the surrounding air. d. both (a) and (c) are true. e. both (b) and (c) are true.
Which numbered area on this geologic map of North America consists of recently added tectonic terranes?
A. 1, southern Alaska B. 2, continental platform of west-central Canada C. 3, continental shield of eastern Canada D. 4, coastal plain along the Gulf Coast of the U.S.
Which type of stream channel develops an intricate pattern of smooth curves along a low-gradient landscape?
A. meandering B. floodplain C. braided D. straight E. sinuous