Astronomy 101 - Final Exam questions and
Verified Answers
Match the prefix with the scientific notation for the order of magnitude of the number.
kilo
mega
giga
tera
a. 10^3
b. 10^12
c. 10^9
d. 10^6 - ANSWER kilo - a. 10^3
mega - d. 10^6
giga - c. 10^9
tera - b. 10^12
Calculate, using Newton's law of gravity, the size of the force of attraction between Earth and a
mass of 9.52 kg located on the surface of Earth. Data: Distance to the center of Earth from the
surface = 6370 km. Mass of Earh = 5.98x1024 kg. Gravitational constant G=6.67x10-11 Nm2/kg2
- ANSWER 92.3
,T/F: Aristotle proposed that all planets revolve around the sun - ANSWER false
T/F: During retrograde motion, planets actually stop and move backward in space. - ANSWER
false
T/F: The heliocentric model of the universe holds that Earth is at the center and everything
else moves around it. - ANSWER false
T/F: Copernicus's theories gained widespread scientific acceptance during his lifetime. -
ANSWER false
T/F Galileo's observations of the sky were made with the naked eye. - ANSWER false
T/F The speed of a planet orbiting the Sun is independent of the planet's position in the orbit -
ANSWER false
T/F: Keppler's laws only hold for the 6 planets known in his time - ANSWER false
T/F: You throw a baseball to someone, before the ball is caught, it is temporarily in orbit around
the Earth's center - ANSWER true
a major flaw in copernicus's model was that it still had - ANSWER circular orbits
a calculation of how long it would take a planet to orbit the sun would be closely related
to Kepler's - ANSWER third law of planetary distances
If Earth's orbit around the Sun were twice as large as it is now, the new year would be -
ANSWER more than 2 current earth years
, An asteroid with an orbit lying entirely inside Earth's - ANSWER has an orbital semi-major axis
of less than 1 AU
Newton's law of gravity states that the force between two objects - ANSWER increases with
mass
Gravity is - ANSWER always an attractive force
in this wave motion people stand up and sit down as the wave passes, what type of wave
is this? - ANSWER transverse
the distance between successive wave crests defines the ____ of a wave - ANSWER wavelength
which of these is not a form of electromagnetic radiation - ANSWER sound waves
Rigel appears as a bright bluish star, whereas
Betelgeuse appears as a bright reddish star.
Rigel is ______ Betelgeuse. - ANSWER hotter than
T/F: The wavelength of green light is about the size of an atom - ANSWER false
T/F Two otherwise identical objects have temperatures of 1000 K and 1200 K respectively. The
object at 1200 K emits roughly twice as much radiation as the object at 1000 K. - ANSWER true
T/F As you drive away from a radio transmitter, the radio signal you receive from the station is
shifted to longer wavelengths. - ANSWER true
Verified Answers
Match the prefix with the scientific notation for the order of magnitude of the number.
kilo
mega
giga
tera
a. 10^3
b. 10^12
c. 10^9
d. 10^6 - ANSWER kilo - a. 10^3
mega - d. 10^6
giga - c. 10^9
tera - b. 10^12
Calculate, using Newton's law of gravity, the size of the force of attraction between Earth and a
mass of 9.52 kg located on the surface of Earth. Data: Distance to the center of Earth from the
surface = 6370 km. Mass of Earh = 5.98x1024 kg. Gravitational constant G=6.67x10-11 Nm2/kg2
- ANSWER 92.3
,T/F: Aristotle proposed that all planets revolve around the sun - ANSWER false
T/F: During retrograde motion, planets actually stop and move backward in space. - ANSWER
false
T/F: The heliocentric model of the universe holds that Earth is at the center and everything
else moves around it. - ANSWER false
T/F: Copernicus's theories gained widespread scientific acceptance during his lifetime. -
ANSWER false
T/F Galileo's observations of the sky were made with the naked eye. - ANSWER false
T/F The speed of a planet orbiting the Sun is independent of the planet's position in the orbit -
ANSWER false
T/F: Keppler's laws only hold for the 6 planets known in his time - ANSWER false
T/F: You throw a baseball to someone, before the ball is caught, it is temporarily in orbit around
the Earth's center - ANSWER true
a major flaw in copernicus's model was that it still had - ANSWER circular orbits
a calculation of how long it would take a planet to orbit the sun would be closely related
to Kepler's - ANSWER third law of planetary distances
If Earth's orbit around the Sun were twice as large as it is now, the new year would be -
ANSWER more than 2 current earth years
, An asteroid with an orbit lying entirely inside Earth's - ANSWER has an orbital semi-major axis
of less than 1 AU
Newton's law of gravity states that the force between two objects - ANSWER increases with
mass
Gravity is - ANSWER always an attractive force
in this wave motion people stand up and sit down as the wave passes, what type of wave
is this? - ANSWER transverse
the distance between successive wave crests defines the ____ of a wave - ANSWER wavelength
which of these is not a form of electromagnetic radiation - ANSWER sound waves
Rigel appears as a bright bluish star, whereas
Betelgeuse appears as a bright reddish star.
Rigel is ______ Betelgeuse. - ANSWER hotter than
T/F: The wavelength of green light is about the size of an atom - ANSWER false
T/F Two otherwise identical objects have temperatures of 1000 K and 1200 K respectively. The
object at 1200 K emits roughly twice as much radiation as the object at 1000 K. - ANSWER true
T/F As you drive away from a radio transmitter, the radio signal you receive from the station is
shifted to longer wavelengths. - ANSWER true
