Ast 248 Selected Answers for HW Chapters 2 and 3
Ryan Richards
Chapter 2
Which of the following is not true about the scientific process? (b) Science advances only
through strict application of the scientific method
Which of the following is not true about a scientific theory? (c) A theory is essentially an
educated guess.
How did the Copernican Revolution alter the perceptions of the ancient Greek debate
over extraterrestial life? (a) It showed that Aristotle’s argument for a unique Earth was
incorrect.
Chapter 3
The Milky Way Galaxy is (c) A collection of more than 100 billion stars, of which our Sun
is one.
The total number of stars in the observable universe is roughly equivalent to (a) The
number of grains and dry sand on all the beaches on Earth