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Practice Astronomy Questions Answers
1) If something were to happen to the sun, it would take __________ for us to know about it.
a) 8 seconds b) 8 minutes c) 8 hours d) 8 days
2) The amount of light energy that a star produces is called its...
a) brightness. b) temperature. c) luminosity. d) colour.
3) As best we can determine, galaxies in the universe are...
a) arranged in a fixed pattern. b) moving through space away from each other.
c) moving towards each other. d) being carried apart as space expands.
4) The apparent shift in the location of an object when viewed from different positions is called...
a) triangulation. b) red shift. c) base line. d) parallax.
5) A GPS system uses two satellites in orbit a known distance apart to calculate the exact location of
a place on earth. This location technique is called...
a) triangulation. b) red shift. c) base line. d) parallax.
6) Most stars start out as...
a) main sequence stars. b) giant stars. c) dwarf stars. d) neutron stars.
7) The way in which a star ends its life is determined by its starting...
a) temperature. b) diameter. c) mass. d) colour.
8) Clumps of matter in the disk of a collapsing nebula form...
a) planets. b) comets. c) asteroids. d) all of the above.
9) The motion of celestial objects across the sky in a night is the result of the...
a) the revolution of the earth around the sun.
b) the rotation of the Earth.
c) the revolution of planets around the sun.
d) the rotation of the galaxy.
10) Our sun releases energy by...
a) burning hydrogen at its core.
b) fusing hydrogen atoms at its core.
c) fusing helium atoms at its core.
d) fusing hydrogen atoms at its surface.
11) Stars exist in a balance between...
a) gravity and rotation.
b) gravity and light.
c) mass and diameter.
d) gravity and outward pressure. (gravity and nuclear fusion)
12) Our Sun is about _________ years old and about _________ through its life span.
a) 5 billion years, half
b) 12 billion years, third
c) 5 million years, third
d) 10 billion years, 90 percent
13) When the sun runs out of Hydrogen and starts fusing Helium it will...
a) shrink down to a very small size.
b) become much hotter.
c) swell up and engulf most of the inner planets.
d) become a super nova.
14) What type of star becomes a neutron star?
a) A star like our sun.
b) The most massive stars.
c) White dwarfs.
d) Red dwarfs.
15) How are the distances to other galaxies measured?
a) Triangulation b) Main sequence c) Cepheid variables d) Radar
16) How are the distances to nearby stars measured?
a) Triangulation b) Main sequence c) Cepheid variables d) Radar
17) Hubble’s Law states that...
a) nothing can travel faster than the speed of light.
b) the farther away you look, the farther back in time you are looking.
c) if you look in any direction you will see your current location.
d) the farther a galaxy is from us, the greater the red shift.
18) Summer on Earth is hot because:
a) The Earth is closer to the sun at that time of year.
b) the Earth’s axis is tilted toward the sun at that time of year.
c) The greenhouse effect kicks in at that time of year.
d) the sun is a Cepheid variable and it is hottest that time of year.
19) The distance from the Earth to the Sun is called a(n):
a) light year
b) astronomical unit
c) parsec
d) kilometer
Lines have been coloured to help identify the elements. Hydrogen is red, calcium is green, mercury is
blue.
Questions 20 to 22 refer to the above line spectra diagram. The stars’ spectra at the bottom show
significant shifting.
20) Of what elements is star A composed?
a) H and Hg b) H and He
c) H and Ca d) Na and H
e) He and Hg
21) Of what elements is star B composed?
a) H and Hg b) H and He
c) He and Ca d) Na and H
e) He and Hg
22) How are each of these two stars moving relative to us?
a) Both are moving away from us.
b) Both are moving towards us.
c) Star A is moving away from us and star B is moving towards us. Star B is very slightly blue-shifted.
d) Star A is moving towards us and star B is moving away from us.
e) Neither star is moving relative to us.
23) We age the Earth at about 4billion years based on:
a) Cepheid variables
b) triangulation
c) retrograde motion
d) radiometric dating
e) Doppler shift
24) We believe the planets were all created from a swirling disk of dust at about the same time
because:
a) the planets all orbit the sun in the same direction
b) the planets all orbit the sun in the same plane – Pluto is the only one out of plane.
c) the earth, the moon and meteorites all have the same age
d) all of the above
Questions 24 to 31 refer to the Hertzsprung-Russell diagram:
25) Which would be the correct order of colours (from left to right) on the bottom of the
Hertzsprung-Russell diagram?
a) Blue Orange Yellow Red
b) Red Yellow White Blue
c) Red Yellow Blue White
d) Blue White Yellow Red
e) Black Green Yellow Red
26) The location of our sun in the Hertzsprung-Russell diagram is...
a) A
b) B
c) C
d) D
e) E
Our sun is not hot, not cold, not big or small.
27) The main sequence on the diagram includes stars...
a) A, B, and C
b) D, B, and E
c) A only
d) D, C and E
28) The last stages of our sun will be
a) A, then E, and finally C
b) E then D Red Giant then white dwarf
c) B then A
d) C then B
29) What type of star is A? Hot and luminous
a) Blue Giant
b) Red Giant
c) White Dwarf
30) Which star will use up its fuel faster?
a) A
b) B
c) C
31) Which star is fusing Helium as fuel?
a) A
b) B
c) C
d) D
e) E
32) Which star is not consuming any fuel at all?
a) A
b) B
c) C
d) D
e) E
d) Red Dwarf
33) Match the correct definition to each term. There are more definitions than terms.
__H__ planet
A) cloud of dust and gas
__K__ moon
B) a large ball of gas that releases energy from nuclear fusion
__B__ star
C) A star which pulsates at a rate proportional to its luminosity
__N__ red giant
__M__ red dwarf
__L__ white dwarf
__I__ comet
D) a small chunk of rock orbiting a star
E) a group of stars, solar systems, and nebula that rotates in space
F) a gravitationally collapsed star
G) a small chunk of rock that falls to earth
H) a large ball of rock, liquid, or gas that orbits a star
_D___ asteroid
I) a small chunk of dirty ice that orbits a star
_J___ meteor
J) a small chunk of rock that passes through earth’s atmosphere
__E__ galaxy
K) a large ball of rock that orbits a planet
__A__ nebula
L) a hot, dying star that no longer fuses hydrogen
__C__ Cepheid variable
M) a cool star that fuses hydrogen extremely slowly
__F__ Black hole
N) a large star that has begun to fuse helium
33) The 8 planets in order of distance from the Sun:
a) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
b) Mercury, Earth, Venus, Mars, Jupiter, Saturn, Uranus, Neptune
c) Earth, Mercury, Mars, Venus, Jupiter, Uranus, Saturn, Neptune
d) Venus, Mercury, Earth, Mars, Saturn, Jupiter, Neptune, Uranus
34) This doesn’t come from the asteroid belt:
a) Asteroid
b) Meteor
c) Meteroid
d) Comet
35) The closest star to us and its distance from us:
a) Sun, 1 light year
b) Sun, 1 astronomical unit
c) Sirius, 1 light year
d) Alpha Centauri, 1 light year
36) The second closest star to us and its distance from us:
a) Sun, 1 light year
c) Alpha Centauri, 4 light years
b) Sirius, 1 light year
d) Betelgeuse, 3 astronomical units
37) Name the star with the greatest apparent magnitude apart from the Sun:
a) Sirius
b) Alpha Centauri
c) Betelgeuse
d) Rigel