Question 1
Earth is estimated to be approximately 4.6 billion years old. Life appeared early in the history of Earth, but metazoans (multicelled organisms) did not appear until about 600 million years ago. If the history of Earth were compressed into a single year, about when would metazoans appear?
◦ late September
◦ late January
◦ late November
◦ mid-December
Question 2
Which of the following would not typically be considered an Earth Science study?
◦ studies of impact craters on the moon
◦ studies of acid mine waters and the bacteria that live in those waters
◦ studies of volcanic eruptions
◦ chemical refining of petroleum