Over the past 100 million years of Earth history, it is known that the magnetic poles have reversed themselves ________ times
A) 0
B) 2
C) 10
D) 25
E) more than 170
Answer: E
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Rutile is used in the production of titanium. Australia accounts for about ________% of the world's supply of rutile
A) 20 B) 40 C) 55 D) 70
Which are important ways that magma can raise through the crust?
A. through fractures that can form dikes B. tectonic forces can help open pathways C. pieces of the wall rocks that break off and provide space D. magma is hotter and less dense than its surrounding E. All of these choices are correct.
The International Date Line ________
A) is the same line as 180 degrees latitude B) is the "baseline" for all time measurements C) is drawn to avoid countries D) passes through the United States E) is an important line of latitude
Crinoids are examples of early plants. Indicate whether the statement is true or false