1.
The positions of the constellations appear to change throughout the year because ____.
A. 
Earth revolves around the Moon
B. 
Earth revolves around the Sun
C. 
The constellations revolve around Earth
D. 
The Sun revolves around Earth
2.
Its _________________ makes Sirius the brightest star in the sky.
A. 
B. 
C. 
D. 
3.
The distances to nearby stars can be measured by using ______________.
A. 
B. 
C. 
D. 
4.
About 90% of the stars in space are ___________________ stars.
A. 
B. 
C. 
D. 
5.
The hottest stars in space are __________ color.
A. 
B. 
C. 
D. 
6.
A main sequence star becomes a _________ after it uses up the hydrogen in its core.
A. 
B. 
C. 
D. 
7.
The Sun produces energy by fusing hydrogen atoms into ________ atoms in its core.
A. 
B. 
C. 
D. 
8.
The intense magnetic fields of sunspots cause archlike eruptions called ______________.
A. 
B. 
C. 
D. 
9.
Our Sun is NOT ___________.
A. 
A part of a binary system
B. 
C. 
D. 
10.
A galaxy that has a shape similar to a football is a(n) _____________ galaxy.
A. 
B. 
C. 
D. 
11.
All of the following are true of the Milky Way EXCEPT that it ___________________.
A. 
B. 
Has more than 800 billion stars
C. 
Is a member of the Local Group
D. 
Is 100,000 light years across
12.
The Big Bang theory of the formation and expansion of our universe is supported by the observed ___________.
A. 
B. 
C. 
D. 
13.
Although it has a greater ____ than Sirius, Rigel does NOT look as bright in the night sky.
A. 
B. 
C. 
D. 
14.
A _______ is a region so dense that nothing, including light, can escape its gravity field.
A. 
B. 
C. 
D. 
15.
Dark, cooler areas of the Sun's surface are called ___________.
A. 
B. 
C. 
D. 
16.
The Clouds of Magellan are two __________ galaxies orbiting the Milky Way.
A. 
B. 
C. 
D. 
17.
The coolest stars in the sky are _______ in color.
A. 
B. 
C. 
D. 
18.
A group of stars, gas, and dust held together by gravity is a
A. 
B. 
C. 
D. 
19.
The sequence of star colors from hottest to coolest is ______________.
A. 
Blue, yellow, orange, red
B. 
Red, orange, yellow, blue
C. 
Blue, red, yellow, orange
D. 
Yellow, blue, orange, red
20.
_________ are patterns of stars in the sky.
A. 
B. 
C. 
D. 
21.
As Earth travels in its ____________, different constellations are visible at different times of the year.
A. 
B. 
C. 
D. 
22.
A measure of the amount of light given off by a star is its ___________________
A. 
B. 
C. 
D. 
23.
A measure of the amount of light received on Earth is a star's _________________.
A. 
B. 
C. 
D. 
24.
______________ is the apparent shift in the position of an object when viewed from two different locations.
A. 
B. 
C. 
D. 
25.
A star begins as a ___________, a large cloud of gas and dust.
A. 
B. 
C. 
D.