In which region in the map below are fauna similar even across islands because the areas within that region were once together as part of Gondwana?
A) A
B) B
C) C
D) D
C) C
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If an isotope has a half-life of 50 million years and an 1/8 of the sample remaining consists of that
isotope, the age of the rock from which it was taken is: a. 400 million years. b. 300 million years. c. 150 million years. d. 800 million years. e. none of the above
The balanced equation 3 H2(g) + N2(g) ? 2 NH3(g) means which of the following?
A) Three grams of hydrogen react with one gram of nitrogen to form two grams of ammonia. B) Three moles of hydrogen react with one mole of nitrogen to form two moles of ammonia. C) The equation means both a and b. D) The equation means neither a nor b.
Which factor best supports the observation that water weathers some rocks faster than others?
A. rock properties B. rock type C. climate
Which of the following describes air that resists vertical displacement?
A. neutral B. unstable C. stable D. latent