As the solar system began forming,the first materials to condense into small particles were ________ and nickel.
A) oxygen
B) silicon
C) nitrogen
D) carbon
E) none of these
Correct Answer:
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Q1: What would have happened to the earth
Q3: The _ means "the Sun in the
Q4: Which one of the following represents the
Q5: The heaviest element produced by nuclear fusion
Q6: Earth's core,mantle,and crust formed during the _.
A)Archaean
B)Proterozoic
C)Paleozoic
D)Hadean
E)Tertiary
Q7: The earth formed approximately _ years ago.
A)5,000
B)11,000,000
C)4,600,000,000
D)13,700,000,000
E)33,200,000,000,000
Q8: Why is the molten metallic outer core
Q9: Much of the early hydrogen and helium
Q10: Why is it important that we have
Q11: Which of the following was an important
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