Multiple Choice
By the term universe, astronomers mean
A) the system of the Sun, its planets and moons, and small pieces of debris that surround it
B) the system of 200 to 400 billion stars, of which the Sun is one
C) the collection of several dozen galaxies, of which the Milky Way is one
D) everything that we can observe
E) the realm inside the atom
Correct Answer:
Verified
Correct Answer:
Verified
Q1: The smallest piece of an element (like
Q2: The way scientists know that a hypothesis
Q3: The star that provides energy for life
Q5: Of these which is the closest to
Q6: Of these, which is the largest?<br>A) Earth<br>B)
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Q10: The Astronomical Unit (AU) as defined by
Q11: When the authors of our textbook say