The most abundant rock-forming minerals are the nonferromagnesian silicates called the
____________________. Fill in the blank(s) with the appropriate word(s).
feldspars
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Why is it so difficult to determine how fast sea level is rising?
What will be an ideal response?
If the continents were once joined together, rocks and mountain ranges on the margins of each should have ____
A)formed under the same conditions and in the same sequence B)formed the same sequences but at different times C)formed under different conditions at different times D)formed different sequences at the same time E)slowed down the process of continental drift
After the separation of North America and Africa in the Mesozoic, the Appalachian region
experienced block faulting and igneous activity. Indicate whether the statement is true or false.
The salinity of seawater remains constant because
A) salts are removed from seawater about as fast as they are deposited. B) salts are included in the molecular formula of seawater. C) salts no longer form in the ocean. D) salinity measurement technology is unreliable.