©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
ERTH101 Exam Questions With Correct
Answers
a. it is intrinsically bright (a bright bulb)
b. it is close to us
c. both a. and c. are possible [TACNO]
d. it is intrinsically dim (a dim bulb - answer✔Somes stars appear bright to our eyes in the night
skiy. The reason a star appears bright is because
alpha - answer✔The brightest star in a consteallation is named for the Greek letter a; for
example ________ - Orionis is another name for the star Betelgeuse.
the Earth is rotating on its axis - answer✔The stars in the sky appear to move on a giant
"celestial sphere" because
88 constellations - answer✔The stars in the sky are organized into groups of stars called
constellations which appear near each other in the sky but are not necessarily close together in
space. How many constellations are currently accepted by the IAU?
1|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Hipparchus - answer✔This Greek Astronomer established a magnitude scale for stars. The
brightest were called first magnitude stars, and the dimmest that could be seen with the ey
were sixth magnitude.
more than half full - answer✔A gibbous phase means the moon is
1/2 of it - answer✔According to Phil, all spherical objects in space have the same amount lit up
by the sun. What fraction of the moon is always lit up by the sun (as seen from space).
52 minutes later - answer✔Because of its orbit around the Earth, the moon rises about
______________________ each day.
Full Earth (entire face illuminated) - answer✔If you could stand on the moon when you see it as
a New Moon, you would see the Earth as a
Terminator - answer✔The line which divides the sunlit side from the dark side of the moon is
called the
setting on the western horizon - answer✔When the first quarter moon is highest in the sky,
where is the sun?
Earthshine - answer✔When you see a waxing crescent phase in the sky, you can still "see" the
dark part of the moon, the part not lit up by direct sunshine due to light reflected from the
Earth which then hits the Moon. This light is called
2|Page
ALL RIGHTS RESERVED.
ERTH101 Exam Questions With Correct
Answers
a. it is intrinsically bright (a bright bulb)
b. it is close to us
c. both a. and c. are possible [TACNO]
d. it is intrinsically dim (a dim bulb - answer✔Somes stars appear bright to our eyes in the night
skiy. The reason a star appears bright is because
alpha - answer✔The brightest star in a consteallation is named for the Greek letter a; for
example ________ - Orionis is another name for the star Betelgeuse.
the Earth is rotating on its axis - answer✔The stars in the sky appear to move on a giant
"celestial sphere" because
88 constellations - answer✔The stars in the sky are organized into groups of stars called
constellations which appear near each other in the sky but are not necessarily close together in
space. How many constellations are currently accepted by the IAU?
1|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Hipparchus - answer✔This Greek Astronomer established a magnitude scale for stars. The
brightest were called first magnitude stars, and the dimmest that could be seen with the ey
were sixth magnitude.
more than half full - answer✔A gibbous phase means the moon is
1/2 of it - answer✔According to Phil, all spherical objects in space have the same amount lit up
by the sun. What fraction of the moon is always lit up by the sun (as seen from space).
52 minutes later - answer✔Because of its orbit around the Earth, the moon rises about
______________________ each day.
Full Earth (entire face illuminated) - answer✔If you could stand on the moon when you see it as
a New Moon, you would see the Earth as a
Terminator - answer✔The line which divides the sunlit side from the dark side of the moon is
called the
setting on the western horizon - answer✔When the first quarter moon is highest in the sky,
where is the sun?
Earthshine - answer✔When you see a waxing crescent phase in the sky, you can still "see" the
dark part of the moon, the part not lit up by direct sunshine due to light reflected from the
Earth which then hits the Moon. This light is called
2|Page
