Astronomy Test
Practice test
Name___________________
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___Gravity bends light.
___Black holes have no mass.
___A black hole may lie at the center of our galaxy
___An Irregular galaxy may consist of very young stars.
___Our solar system lies on the outer arm of a SB galaxy.
___Worm holes probably do not exist.
___The Schwarzschild radius is dependent on the volume of the object.
___Relativity differs from classical physics in that it redefines gravity as a mutual
attraction between two objects that makes larger objects grab hold of smaller ones.
9) ___Nothing can travel faster than the speed of light
10) ___Quasars are very old.
11) ___The density of a neutron star is comparable to the density of an atomic nucleus.
12) ___As a result of their small size and large masses, neutron stars have weak
gravitational pulls at their surfaces.
13) ___All things except light are attracted by gravity
14) ___The gravitational pull of your body’s mass is felt everywhere in our universe.
15) ___Loosely speaking, a black hole is an object whose escape speed equals or exceeds
the speed of light.
Multiple Choice.
16) What type of object is the most energetic in our universe?
a) A supernova explosion
b) An atomic bomb
c) A Quasy Stellar Object
d) A black hole
17) This type of galaxy is usually found in the center of clusters.
a) Spiral
b) Lenticular
c) Elliptical
d) Irregular
e) Barred spiral
18) When we look towards the center of our galaxy we see an abundance of
a) Pulsars
b) Quasars
c) Globular Clusters
d) Black holes
19) This type of galaxy is made up of really old stars.
a) Barred Spiral
b) Elliptical
c) All of the above
d) Spiral
20) Our solar system most likely lies in this type of galaxy.
a) A spiral
b) A barred spiral
c) A lenticular
d) An elliptical
21) In order for a star to become a black hole it must
a) Fuse lead in it’s core
b) Have enough mass
c) Be on the main sequence
d) Become a giant
22) The following is NOT true about worm holes
a) They are proven mathematically
b) They are a feasible means of time travel
c) They are full of X-Rays and Gamma Rays
d) They are likely to be unstable
23) Where are the theories of both relativity and quantum mechanics forced together?
a) Neutron stars
b) Black holes
c) Worm holes
d) Anything on the astronomical scale
24) Branch of physics which dictates we can only predict things according to probabilities
a) Relativity
b) Newtonian Physics
c) Classical Physics
d) Quantum Mechanics
25) According to general relativity, space is warped or curved by
a) Massive objects
b) light
c) gravity
d) the four fundamental forces
26) If the sun were to magically turn into a black hole of the same mass, Earths orbit
would
a) stay the same since the mass has not changed
b) be pushed outward by the nuclear forces creating the black hole
c) be pulled inward by the black holes gravitational forces
d) move off in a straight line path our of orbit
27) Black holes of stellar origin are believed to have been discovered in several
a) Galaxy centers
b) Binary systems
c) We have not discovered any stellar origin black holes
d) Both a and b
28) Gravitational lensing is when?
a) Light is bent around a massive object.
b) Magnetic fields create multiple images of objects behind them
c) all of the above
d) Conservation of energy and angular momentum create a bending of light to create
secondary images
29) Young stars are most likely to be found in this type of galaxy.
a) Irregular
b) Elliptical
c) Barred Spiral
d) Lenticular
30) Where are spiral galaxies most commonly found?
a) In the center of clusters
b) In areas of low galactic density
c) They are usually found grouped close together
d) In the local group
31) The large and small Magellenic clouds are classified as this type of galaxy.
a) Irregular
b) Lenticular
c) Spiral
d) Barred Spiral
Essay
32) Explain why all neutron stars are not seen as pulsars?(5 points)
33) Draw a diagram of a black hole. Label and explain each part. (10 points)
34) What is the name of our home galaxy?__________.
35) What is the most energetic object we know about?______________.
36) The theory in physics which states that particles obey laws only according to
probabilities is called_______________.
You also need to be able to classify galaxies according to type and then according to
Hubble’s Tuning fork. (i.e. spiral: Sa)
You should know the difference between a globular cluster, an open cluster, a bok
globule, emission nebula, reflection nebula, and planetary nebula.