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Test your basic knowledge |
Cosmology
Start Test
Study First
Subject
:
science
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The process responsible for creating the arms of flocculent spiral galaxies
Nova
Gamma-ray Burst
Sc spiral galaxy
Self-Propogating Star Formation
2. All wavelengths of light emitted by a blackbody.
Roundest orbit
density waves
Halo
Blackbody Curve
3. The apparent backward motion of a planet against the background of stars.
retrograde motion
Bulge
protostar
self-propagating star formation
4. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.
Light-Year
Electromagnetic Radiation: Gamma Ray
greehouse effects
mass
5. The Greek philosopher responsible for making the stellar magnitude scale.
We don't know. It might be but does not have to be.
Hipparchus
CMB
Wein's Law
6. A continuous spectrum of light missing energy at a few wave lengths.
Prominence
Absorption Spectrum
meteoriod
great dark spots
7. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t
fastest rotation
Absolute Magnitude
Penumbra
Spectroscopic parallax
8. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
self-propagating star formation
Positive - Converge - Greater than 1
Coronal Loop
Hubble constant
9. A distance measure determined by the shifting of a star against the background sky every 6 months.
Planck time
Parsec
Astronomical Unit
retrograde motion
10. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker
Seyfert galaxy
Photon
Meridian
Convection
11. An object that may remain after a star explodes
Neutron Star
Enke gap
Granules
Meridian
12. The point in its orbit where a planet is farthest from the sun
H2 Regions
evidence of water on mars
Bok Globule
aphelion
13. Why does the earth have few craters while the moon has many?
Precession
planetary nebula
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Thickest atmosphere
14. Either Io -Europa - Ganymede - or Callisto
general star population
semimajor axis
Galilean satellite
Celestial Sphere
15. Venus
Turn off Point
Thickest atmosphere
Nucleus
resonance
16. A long-lived high-pressure bulge in Jupiter's southern hemisphere
Primary Mirror
great red spot
tectonics of Venus
mare basalt
17. Jupiter
High Velocity Stars
Largest diameter
Hipparchus
Black Hole
18. Earth
Kirchhoff's Law
Sb spiral galaxy
Radio Galaxy
Most dense
19. The 'edge' of the universe. Light beyond this has not reached us yet.
Coldest surface
HII Region
regolith
partile horizon
20. The distance light travels in one year (=9.46x10^12km).
Corona
Light-Year
Red Giant Branch Star
Neutron Star
21. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie
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22. A collection of galaxies like the one the Milky Way belongs to
Poor Cluster
partile horizon
H2 Regions
accretion
23. The elementary building blocks from which protons and neutrons are formed.
direct motion
Proton-proton chain
Gravitational Lens
quarks
24. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this
Pixel
Kuiper belt
Grand design spirals
Supercluster
25. The name for the only seriously considered theory of the universe.
Big Bang
molecular clouds
great red spot
meteor
26. The average distance between the Earth and the Sun (=1.5 x10^8km)
least dense
Sb spiral galaxy
Pulsar
Astronomical Unit
27. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.
Parallax
Oort Cloud
Celestial Sphere
coma
28. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.
Cosmological Principle
Negative - Diverge - Less than 1
Continuous Spectrum
radio galaxy
29. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.
tectonics of Venus
MOONS: larger than mercury
Light Curve
Eclipses of the Moons of Jupiter
30. The gap inthe outer portion of Saturn's A ring
Jovian Planets
Enke gap
Kuiper belt
fewest moons
31. The layer of the sun just above the photosphere
semimajor axis
rotation curve = dark matter?
Chromosphere
Cosmological Principle
32. Light scattered through the atmosphere that degrades astronomical images
protostar
Nucleus
Light Pollution
Roundest orbit
33. When the Sun is farthest south of the celestial equator (About December 22)
Flare
partile horizon
quarks
Winter Solstice
34. Jupiter - Saturn - Uranus - Neptune
Jovian Planets
widmanstatten pattern
self-propagating star formation
We don't know. It might be but does not have to be.
35. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.
blazar
300000 KM/sec
molecular clouds
tectonics of Venus
36. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years
Kuiper belt
Milky way Galaxy
matter dominated universe
Penumbra
37. A faint - remarkably uniform distribution of radiation in space
Focal Plane
Electromagnetic Radiation: Visible Light
accretion disk
Cosmic Microwave Background
38. In Ptolemy's geocentric solar system - the small circle on which a planet moved.
Observations of distant type Ia supernovae indicate that the expansion of the universe is speeding up with time - not slowing down! So there must be a force causing this.
epicycle
highlands
density
39. A rock or iron specimen that has fallen from space
Cosmic Microwave Background (CMB)
Grand design spirals
cosmic singularity
meteorite
40. The sinking of denser elements to the center of a young molten planet
SETI
chemical differentiation
Parallax
Parsec
41. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)
Flocculent spirals
Extrasolar Planet
Doppler Shift
Pulsar
42. 10 cm -> 1 mm
Negative - Diverge - Less than 1
Io (jupiters moon)
Electromagnetic Radiation: Microwave
CNO Cycle
43. Matter so dense that even light cannot escape its gravity
Gravity only pulls matter back together. Therefore - if gravity is the only force that operates on cosmic scales then the expansion of the universe should decrease with time. The critical density is the value of matter density sufficient to halt the
Summer Solstice
Superior planets
Black Hole
44. Jupiter - Saturn - Uranus - Neptune
Nebula
High and low pressure which stretch into bands due to the rapid differential rotation. deeper - darker colors are in the belts and zones are lighter
Jovian Planets
Electromagnetic Radiation: Radio
45. The process similar to conduction by which energy moves from the solar core to the convective layer
solar nebula
Apollo asteroids
Sidereal Day
Radiative Diffusion
46. Mercury
Metals
Atomic Number
thinnest atmosphere
Hyashi track
47. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant
Ole Roemer
aurora
conjunction
Thermal Equilibrium
48. The act of removing an electron from an atom.
cosmic singularity
semimajor axis
Nowhere visible to us. If there are higher dimension then the center would be visible to someone who lives in one. If there are no higher dimensions then the center does not exist.
Ionization
49. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.
Shepherd satellite
acceleration
self-propagating star formation
If it is in a denser medium - such as glass - it will move slower
50. That which is responsible for Jupiter's magnetic field
great red spot
Atomic Number
zone
Liquid metallic hydrogen