What materials are best dated with carbon-14?
A) Igneous rocks
B) Volcanic rocks
C) Organic materials
D) Sandstones
Answer: C
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The two primary materials that geologists use as clues to understand Earth's past are
____________________ and ____________________. Fill in the blank(s) with the appropriate word(s).
The main layers of the Earth in correct order, from the surface moving down is:
a) upper core, outer core, inner core, mantle b) outer core, inner core, upper mantle, lower crust c) crust, mantle, outer core, inner core d) upper mantle, lower mantle, inner core, crust
Due to rock cycle processes, finding old rocks by radioactive methods is difficult. What is the age of the oldest single rock found on Earth to date?
A) more than 2 billion years B) more than 2.5 billion years C) more than 3 billion years D) more than 4 billion years
The removal of mangrove forests in coastal areas has resulted in ____.
A. more beaches along which water can collect B. less seawater being held near the shore C. increased flooding D. a reduction in storm surges E. a reduction in mangrove related deaths