The average density of the rocks near the surface is about __________ grams per cubic centimeter.
A) 2
B) 2.9
C) 3.4
D) 4
Correct Answer:
Verified
Q49: The crust is composed of both continental
Q50: The magnetosphere shields Earth from _.
A)ultraviolet radiation
B)X-rays
C)gamma
Q51: Q52: Earth's earliest fossils are as old as Q53: Most of the heat loss from Earth's Q55: At 40 kilometers depth the temperature is Q56: What have scientists concluded about Earth based Q57: Which geologic time period are we currently Q58: The earliest mammal fossils are about _ Q59: 
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