Multiple Choice
Why is it hard to find rocks from Earth's early history?
A) because of heavy bombardments that melted most of Earth's crust up until 3.8 billion years ago
B) because of plate tectonics that destroyed rocks
C) because rocks are ephemeral structures
D) a and b
E) a, b, and c
Correct Answer:
Verified
Correct Answer:
Verified
Q27: Which of the following allowed scientists to
Q28: Oceans probably existed by<br>A) 4.56 billion years
Q29: Why was the debate on Earth's age
Q30: What is coal?<br>A) the remnants of fires
Q31: Zircons are<br>A) tiny specks of carbon preserved
Q33: Life may have existed as long ago
Q34: Darwin believed that Earth was<br>A) a few
Q35: What are four features shared by all
Q36: Explain what we know about the transition
Q37: How do medical technologies help elucidate the