When did our solar system form?
A) about 540 million years ago
B) about 2.5 billion years ago
C) about 4.6 billion years ago
Correct Answer:
Verified
Q25: Which of the following rock types would
Q26: The Earth has had a magnetic field
Q27: Which of the following statements is true?
A)
Q28: What is the lower mantle made up
Q29: Humans have been on Earth for _
Q31: Evidence in the rock record shows that
Q32: About when did the first animals evolve
Q33: About when are Homo sapiens thought to
Q34: How did Earth's atmosphere become oxygenated?
A) volcanic
Q35: Geologic evidence indicates Earth's moon and core
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