Download Astronomy Quiz 12 “Stars

Astronomy Quiz 12 “Stars”
NAME________________________________________DATE______________PER______
Summer triangle Q
_____1. How bright a star appears from 10 parsecs away is the star’s __ magnitude.
A. luminous
B. absolute
C. apparent
D. relative
_____2. 80% of all stars in the galaxy are __ while only 1 in 10,000 is a __.
A. white dwarfs / red giant
C. red giants / blue dwarfs
B. yellow dwarfs / red supergiant
D. red dwarfs / blue supergiant
_____3. The actual 3D motion of stars relative to each other in a rotating and swirling galaxy is called __ motion.
A. radial
B. proper
C. real
D. transverse
_____4. How far away is a star that shows 1” (1 arc second) of parallax motion throughout earth’s year?
A. 100 parsecs
B. 10 parsecs
C. 0.1 parsec
D. 1 parsec
_____5. Stellar temperatures can be determined by comparing a star’s radiation curve to the ___.
A. blackbody curve
B. parallax curve
C. sun
D. Hertzprung thermometer
_____6. Mass is the fuel for stellar fusion, so who do high-mass stars have such short lives?
A. High mass causes stronger gravity, which forces fusion to occur at a faster rate, and they burn out quickly.
B. High mass inhibits the gravitational force, slowing fusion.
C. High mass stars have atomic nuclei “bumping” against each other at rates high enough to trigger a supernova.
D. The statement is incorrect. High mass stars are the oldest stars.
_____7. __ stars are still fusing H into He in their cores.
A. neutron stars
B. main sequence
_____8. Complete the proportion:
A. Doppler shift
__ ∞ radius2 x temp4
B. Color
C. white dwarfs
C. Luminosity
D. red giants
D. Parallax
_____9. Current constellations will be unrecognizable in 100,000 years because of __.
A. parallax
B. retrograde motion C. proper motion
D. earth’s orbital motion
_____10. According to Einstein’s General Relativity, if you are close to super-strong source of gravity (e.g. a black hole)
what happens to the flow of time for you compared to someone farther away from the source?
A. it stops completely for you
B. it speeds up for you
D. it doesn’t change at all
C. it slows down for you
_____11. One parsec (parallax second) is about:
A. 1.0 LY
B. 3.3 LY
C. 33.0 LY
_____12. Which of the following stars is the hottest?
A. F4
B. K6
C. G2
D. M7
D. 0.033 LY
E. K0
_____13. A Hertzprung-Russell diagram plots stars’ ___ on the horizontal x-axis.
A. luminosity
B. mass
C. proper motion
D. temperature
_____14. Which constellation has two “pointers” that point toward the pole star?
A. Big Dipper
B. Southern Cross
C. Orion
D. Pleiades
E. A & B are both correct
Match the star’s name on the right to its description on the left. (2pt ea)
_____15. represents one of the twins’ heads in the constellation Gemini
A. Polaris
E.  centauri
_____16. a member of Orion’s Belt
B. Betelgeuse
F. Capella
_____17. brightest star in the nighttime sky
C. Sol
G. Pollux
_____18. always in the same place in the sky, 24/7, 365.
D. Sirius
H. Alnilam
_____19. ~400 LY away; will go supernova & outshine the full moon for 2 mo.
_____20. is actually a “quad” (a binary pair orbiting another binary pair)
_____21. is a yellow G2
Astronomy Quiz 12 “Stars”
NAME________________________________________DATE______________PER______
_____1. Complete the proportion: __ ∞ radius2 x temp4
A. Doppler shift
B. Luminosity
C. Color
D. Parallax
_____2. Current constellations will be unrecognizable in 100,000 years because of __.
A. parallax
B. proper motion
C. retrograde motion
_____3. One parsec (parallax second) is about:
A. 1.0 LY
B. 33.0 LY
C. 3.3 LY
D. earth’s orbital motion
D. 0.033 LY
_____4. According to Einstein’s General Relativity, if you are close to super-strong source of gravity (e.g. a black hole)
what happens to the flow of time for you compared to someone farther away from the source?
A. it stops completely for you
B. it slows down for you
_____5. Which of the following stars is the hottest?
A. M7
B. K6
C. G2
C. it speeds up for you
D. F4
D. it doesn’t change at all
E. K0
_____6. A Hertzprung-Russell diagram plots stars’ ___ on the vertical y-axis.
A. temperature
B. mass
C. proper motion
D. luminosity
_____7. Which constellation has two “pointers” that point to Polaris?
A. Pleiades
B. Southern Cross
C. Orion
D. Big Dipper
_____8. 80% of all stars in the galaxy are __ while only 1 in 10,000 is a __.
A. red dwarfs / blue supergiant
C. red giants / blue dwarfs
B. yellow dwarfs / red supergiant
D. white dwarfs / red giant
_____9. How bright a star appears from earth is the star’s __ magnitude.
A. luminous
B. absolute
C. apparent
D. relative
_____10. The actual 3D motion of stars relative to each other in a rotating and swirling galaxy is called __ motion.
A. radial
B. real
C. proper
D. transverse
_____11. How far away is a star that shows 1” (1 arc second) of parallax motion throughout earth’s year?
A. 1 parsec
B. 10 parsecs
C. 0.1 parsec
D. 100 parsecs
_____12. Mass is the fuel for stellar fusion, so who do high-mass stars have such short lives?
A. The statement is incorrect. High mass stars are the oldest stars.
B. High mass inhibits the gravitational force, slowing fusion.
C. High mass stars have atomic nuclei “bumping” against each other at rates high enough to trigger a supernova.
D. High mass causes stronger gravity, which forces fusion to occur at a faster rate, and they burn out quickly.
_____13. Stellar temperatures can be determined by comparing a star’s radiation curve to the ___.
A. Hertzprung thermometer
B. parallax curve
C. sun
D. blackbody curve
_____14. __ stars are still fusing H into He in their cores.
A. neutron stars
B. white dwarfs
C. main sequence
D. red giants
Match the star’s name on the right to its description on the left. (2pt ea)
_____15. always in the same place in the sky, 24/7, 365.
A. Betelgeuse
E.Capella
_____16. 400 LY away; will go supernova & outshine the full moon for 2 mo.
B. Sol
F. Pollux
_____17. is actually a “quad” (a binary pair orbiting another binary pair)
C. Sirius
G. Alnilam
_____18. represents one of the twins’ heads in the constellation Gemini
D. Polaris
H.  centauri
_____19. a member of Orion’s Belt
_____20. brightest star in the nighttime sky
_____21. is a yellow G2
_____6. If a star is moving toward or away from us its spectral lines will be __.
A. thicker
B. red- or blue-shifted
C. more numerous
D. faster
_____12. Which of the following will always be in the same place in the sky regardless of time of day or time of year?
B. Polaris
B. Sirius
C. Procyon
D. Deneb
E. Betelgeuse
_____10. Which of the following stars is actually a “quad” (a binary pair of giants orbiting a binary pair of red dwarves):
A. Capella
B. Sol
C. Polaris
D. Betelgeuse
_____3. Which of the following is the brightest star in the nighttime sky?
A. Polaris
B. Sirius
C. Procyon
D. Deneb
_____19. Which of the following is NOT a member of Orion’s Belt?
A. Alnitak
B. Mintaka
C. Betelgeuse
D. Alnilam
_____1. __ stars are relatively hot, but surprisingly dim.
A. red giant
B. neutron
C. white dwarf
D. main sequence
E. Betelgeuse
How can the mass of stars be determined by observing binary-star systems?
If the distance to a visual binary is known, the semi-major axis of its orbit can be determined
directly, by simple geometry. For spectroscopic binaries, it is not possible to determine the
semi—major axis directly. Doppler—shift measurements give us information on the orbital
velocities of the member stars, but only on their radial components. As a result, we cannot
determine the inclination of the orbit to our line of sight, and this imposes a limitation on how
much information we can obtain
_____9. Which of the following has the outer objects of the Orion Group in the correct sequence?
A. Procyon – Sirius – Pollux – Capella – Castor – Pleiades
B. Sirius – Castor – Pollux – Capella – Procyon – Pleiades
C. Sirius – Procyon – Pollux – Castor – Capella – Pleiades
D. Capella – Procyon – Pollux – Castor – Pleiades – Sirius
Moving counter-clockwise (northern hemisphere perspective!) list the seven stars (and one star
cluster) that comprise the “halo” above Orion.
Sirius (A1, -1.46)
Procyon (F5, 0.34)
Pollux (K0, 1.14)
Castor (A1, 1.93)
Capella (G8, K0, G1; 0.91, 0.76, 0.08 Capella is actually four stars: two binary pairs, orbiting each other!)
Pleiades star cluster (aka “Seven Sisters” …aka the Subaru logo)
Aldebaran (K5, 0.8)
Draw and label the constellation Orion (use the other side of this sheet). Label all seven stars, and
the one non-star!
Head = Betelgeuse (M2, 0.42)
Shoulder = Bellatrix (B2, 1.64)
Belt (l-r NH) Alnitak (triple system: O9, O9, B0),
Alnilam (A1,1.7),
stars)
Knife = Orion Nebula
Lower left = Saiph (B0, 2.09)
lower right = Rigel (B8, 0.12)
Mintaka (09, B0, etc actually four