How old is Earth?
A) approximately 4.5 thousand years
B) approximately 4.5 billion years
C) approximately 4.5 million years
D) approximately 4.5 trillion years
Correct Answer:
Verified
Q10: Which of the following makes up the
Q11: Earth's core is made up primarily of
A)iron.
B)lead.
C)oxygen.
D)silicon.
Q12: Which of the following statements about the
Q13: According to the principle of uniformitarianism,
A)geologic processes
Q14: What powers Earth's external heat engine?
A)gravitational energy
B)radioactive
Q16: In which of the following subsystems is
Q17: Which of the following statements regarding the
Q18: Living organisms have been on Earth for
Q19: Earth's climate system involves interactions between the
Q20: Solar energy energizes all of the following
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