Multiple Choice
The heavy elements that now make up the stars,planets,and even us were formed
A) at the very beginning of the universe,during the Big Bang.
B) as the energy of the early universe condensed into matter.
C) by unknown processes.
D) by nuclear reactions within early stars.
Correct Answer:
Verified
Correct Answer:
Verified
Q10: Multicellular organisms first appear<br>A)3.6 billion years ago.<br>B)2
Q11: The sudden appearance of organisms with shells
Q12: Photosynthesis is<br>A)a process found only among modern
Q13: Organic compounds on earth first came from<br>A)processes
Q14: The formation of the "supercontinent" of Pangea<br>A)was
Q15: How old is the first evidence of
Q16: The earth was formed about<br>A)1 million years
Q18: At the moment,the best guess for the
Q19: An important result of the evolution of
Q20: What is the relationship in time between