1
ASTR 100 Exam 1 Questions with Correct
Answers | Updated (100% Correct Answers)
A theory, in science, is a guess about what might be true. Answer:
False
Once a theory is proved in science, scientists stop testing it.
Answer: False
The sun is a part of
a. The Solar System
b. The Milky Way Galaxy
c. The Universe
d. All of the Above Answer: d. All of the Above
A light-year is a measurement of
a. Distance
b. Speed
c. Mass
d. Time Answer: a. Distance
The average distance from Earth to the Moon is 384,000 km.
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,2
a. How many hours would it take, traveling at 800 kilometers per
hour (km/h) -the typical speed of a jetcraft- to reach the Moon?
b. How many days is this? Answer: Formula: T=D/V
a. 480 hours
b. 20 days
The Celestial sphere is not an actual object in the sky. Answer: True
The phases of the Moon are caused by the relative position of
Earth, the Moon, and the Sun. Answer: True
Which stars do we see at night depend on? (select all that apply)
a. our location on Earth
b. earth's location in orbit
c. the time of the observation
d. the motion of stars relative to one another over the course of the
year Answer: a. our location on Earth
b. earth's location in orbit
c. the time of the observation
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, 3
You see the Moon rising just as the Sun is setting. What phase is it
in?
a. Waxing Crescent
b. Waning Crescent
c. Full Moon
d. New Moon
e. 1st Quarter
f. 3rd Quarter Answer: c. Full Moon
On the vernal and autumnal equinoxes,
a. The sun is located on the celestial equator.
b. All of the above.
c. The entire Earth has 12 hours of daylight and 12 hours of
darkness.
d. The sun rises due east and sets due west.
e. None of the above. Answer: b. All of the above
We always see the same side of the Moon because
a. The moon rotates once each revolution.
© 2025 All rights reserved
ASTR 100 Exam 1 Questions with Correct
Answers | Updated (100% Correct Answers)
A theory, in science, is a guess about what might be true. Answer:
False
Once a theory is proved in science, scientists stop testing it.
Answer: False
The sun is a part of
a. The Solar System
b. The Milky Way Galaxy
c. The Universe
d. All of the Above Answer: d. All of the Above
A light-year is a measurement of
a. Distance
b. Speed
c. Mass
d. Time Answer: a. Distance
The average distance from Earth to the Moon is 384,000 km.
© 2025 All rights reserved
,2
a. How many hours would it take, traveling at 800 kilometers per
hour (km/h) -the typical speed of a jetcraft- to reach the Moon?
b. How many days is this? Answer: Formula: T=D/V
a. 480 hours
b. 20 days
The Celestial sphere is not an actual object in the sky. Answer: True
The phases of the Moon are caused by the relative position of
Earth, the Moon, and the Sun. Answer: True
Which stars do we see at night depend on? (select all that apply)
a. our location on Earth
b. earth's location in orbit
c. the time of the observation
d. the motion of stars relative to one another over the course of the
year Answer: a. our location on Earth
b. earth's location in orbit
c. the time of the observation
© 2025 All rights reserved
, 3
You see the Moon rising just as the Sun is setting. What phase is it
in?
a. Waxing Crescent
b. Waning Crescent
c. Full Moon
d. New Moon
e. 1st Quarter
f. 3rd Quarter Answer: c. Full Moon
On the vernal and autumnal equinoxes,
a. The sun is located on the celestial equator.
b. All of the above.
c. The entire Earth has 12 hours of daylight and 12 hours of
darkness.
d. The sun rises due east and sets due west.
e. None of the above. Answer: b. All of the above
We always see the same side of the Moon because
a. The moon rotates once each revolution.
© 2025 All rights reserved
