Deep Sea Trenches Are Formed by

Q2: Radiocarbon dating<br>A) requires carbon-12.<br>B) relies on knowledge

Q3: Fossil evidence suggests that the oldest terrestrial

Q4: Which of the following were common predators

Q5: During the Cenozoic era<br>A) mammals first appeared.<br>B)

Q6: The oldest evidence of life on earth

Q8: The intervals of the geological time scale

Q9: A region that includes northern fir forests

Q10: Fossils in rocks tell us of the

Q11: The following are events in the history

Q12: Which of the following marine groups became