AST 1002 EXAMS 2 ALL ANSWERS AND QUESTIONS
SET A+
✔✔A white dwarf in a binary system which is accreting matter from a larger companion
can manifest itself as a repeating phenomenon known as a - ✔✔Nova
✔✔Which one of these effects does NOT originate in the Sun's magnetic activity cycle?
- ✔✔Neutrinos which pass through the Earth.
✔✔A protostar typically radiates most of its energy in the _____________ part of the
electromagnetic spectrum. - ✔✔infrared radio
✔✔Why do asteroids and comets differ in composition? - ✔✔Asteroids formed inside
the frost line, while comets formed outside.
✔✔The Oort Cloud is believed to be - ✔✔a spherical cloud of cometary nuclei far
beyond the Kuiper Belt
✔✔The tops of convection cells can be seen just below the surface of the Sun are
called - ✔✔solar granules
✔✔What types of stars end their lives as supernovae? - ✔✔Stars that are much more
massive than the Sun
✔✔A cloud fragment too small to collapse into a main sequence star becomes a -
✔✔brown dwarf.
✔✔A loop of gas following the magnetic field lines between sunspots' poles is - ✔✔a
prominence
✔✔How can the evolution of a close binary be different from that of an isolated star? -
✔✔Close binaries can exchange mass, altering their evolutionary paths.
, ✔✔Why are sunspots darker than the surrounding solar material? - ✔✔They are cooler
and radiate comparatively less energy.
✔✔Which are the four Galilean moons of Jupiter? - ✔✔Io, Europa, Ganymede, and
Callisto
✔✔What defines the event horizon of a black hole? - ✔✔the radius at which the escape
speed equals the speed of light
✔✔The formation of what kind of core ultimately leads a massive star to explode in a
supernova. - ✔✔an iron core
✔✔As a protostar condenses out of a molecular cloud, we expect it to - ✔✔get hotter
✔✔What can be said with certainty about a red star and a blue star? - ✔✔The blue star
is hotter than the red star.
✔✔How does the apparent brightness or flux of a star behave with increasing distance?
- ✔✔decreases as the distance squared
✔✔What is the final body that result from the collapse of the core of the Sun after it
ends burning all its hydrogen and helium? - ✔✔White dwarf
✔✔The Main Sequence lifetime of a G star is - ✔✔much longer than that of a B star.
✔✔What observations characterize solar maximum? - ✔✔There are many sunspots
visible on the surface of the Sun
✔✔Which of the following is not a method astronomers use to determine the physical
conditions inside the Sun? - ✔✔Observing X-ray images of the solar interior using
satellites.
✔✔Based on its surface temperature of 6,000 K, most photons that leave the Sun's
surface lie in which region of the electromagnetic spectrum? - ✔✔visible
✔✔By what process does the Sun generate energy? - ✔✔nuclear fusion
✔✔At the center of the Sun, nuclear fusion converts hydrogen into - ✔✔helium, gamma
rays, and neutrinos.
✔✔Suppose you try to bring two protons close together. Because of the
electromagnetic force, the two protons will - ✔✔repel one another.
SET A+
✔✔A white dwarf in a binary system which is accreting matter from a larger companion
can manifest itself as a repeating phenomenon known as a - ✔✔Nova
✔✔Which one of these effects does NOT originate in the Sun's magnetic activity cycle?
- ✔✔Neutrinos which pass through the Earth.
✔✔A protostar typically radiates most of its energy in the _____________ part of the
electromagnetic spectrum. - ✔✔infrared radio
✔✔Why do asteroids and comets differ in composition? - ✔✔Asteroids formed inside
the frost line, while comets formed outside.
✔✔The Oort Cloud is believed to be - ✔✔a spherical cloud of cometary nuclei far
beyond the Kuiper Belt
✔✔The tops of convection cells can be seen just below the surface of the Sun are
called - ✔✔solar granules
✔✔What types of stars end their lives as supernovae? - ✔✔Stars that are much more
massive than the Sun
✔✔A cloud fragment too small to collapse into a main sequence star becomes a -
✔✔brown dwarf.
✔✔A loop of gas following the magnetic field lines between sunspots' poles is - ✔✔a
prominence
✔✔How can the evolution of a close binary be different from that of an isolated star? -
✔✔Close binaries can exchange mass, altering their evolutionary paths.
, ✔✔Why are sunspots darker than the surrounding solar material? - ✔✔They are cooler
and radiate comparatively less energy.
✔✔Which are the four Galilean moons of Jupiter? - ✔✔Io, Europa, Ganymede, and
Callisto
✔✔What defines the event horizon of a black hole? - ✔✔the radius at which the escape
speed equals the speed of light
✔✔The formation of what kind of core ultimately leads a massive star to explode in a
supernova. - ✔✔an iron core
✔✔As a protostar condenses out of a molecular cloud, we expect it to - ✔✔get hotter
✔✔What can be said with certainty about a red star and a blue star? - ✔✔The blue star
is hotter than the red star.
✔✔How does the apparent brightness or flux of a star behave with increasing distance?
- ✔✔decreases as the distance squared
✔✔What is the final body that result from the collapse of the core of the Sun after it
ends burning all its hydrogen and helium? - ✔✔White dwarf
✔✔The Main Sequence lifetime of a G star is - ✔✔much longer than that of a B star.
✔✔What observations characterize solar maximum? - ✔✔There are many sunspots
visible on the surface of the Sun
✔✔Which of the following is not a method astronomers use to determine the physical
conditions inside the Sun? - ✔✔Observing X-ray images of the solar interior using
satellites.
✔✔Based on its surface temperature of 6,000 K, most photons that leave the Sun's
surface lie in which region of the electromagnetic spectrum? - ✔✔visible
✔✔By what process does the Sun generate energy? - ✔✔nuclear fusion
✔✔At the center of the Sun, nuclear fusion converts hydrogen into - ✔✔helium, gamma
rays, and neutrinos.
✔✔Suppose you try to bring two protons close together. Because of the
electromagnetic force, the two protons will - ✔✔repel one another.
