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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 Greek philosopher responsible for making the stellar magnitude scale.
Limb darkening
Hubble constant
meteoriod
Hipparchus
2. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?
If it is in a denser medium - such as glass - it will move slower
Interstellar Extinction
smallest diameter
Gamma-ray Burst
3. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the
The Big Bang Theory
aurora
opposition
Celestial Equator
4. A repeated - periodic push or pull capable of summing into a larger push or pull
Primary Mirror
Self-Propogating Star Formation
resonance
quasar
5. Either Io -Europa - Ganymede - or Callisto
Galilean satellite
Instability strip
Photon
Shepherd satellite
6. When the Sun moves from south to north across the celestial equator (about March 21)
Plank's Law
Bulge
Vernal Equinox
Make up of the jovian planets
7. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
Steady State Theory (Leads to Olber's Paradox)
Flat - Remain Parallel - Exactly 1
Red Giant Branch Star
cosmic singularity
8. Where is the center of the expansion
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.
Color Index
dark matter
Spectroscopic parallax
9. The lowest energy of an atom.
Sc spiral galaxy
Ground State
fusion crust
Hubble law
10. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)
Light: travels like a wave - detected like a particle
density parameter
Prominence
terrestrial planet
11. Milky way galaxy is a member - a small poor cluster-about 30 galaxies
The Local Group
Annular Eclipse
planetesimal
most moons
12. 10^2 nm 10^7 nm
Active Optics
Electromagnetic Radiation: Gamma Ray
Cosmic Microwave Background
Enke gap
13. The rotation period of the Earth measured relative to the stars.
Particle Horizon
Seyfert galaxy
fewest moons
Sidereal Day
14. A crystalline patter found in iron meteorites
shape and color of ELLIPTICAL galaxies
Degeneracy
Prominence
widmanstatten pattern
15. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.
contrast northern lowlands and the southern highlands of mars...
Celestial Sphere
dark energy
Ground State
16. The apparent path of the Sun through the stars on the celestial sphere.
Dark Nebula
Color Index
Ecliptic
Supercluster
17. The projection of the Earth's equator onto the celestial sphere.
terrestrial planet
reflection star clusters
Parallax
Celestial Equator
18. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy
weight
Objective Lens
Sb spiral galaxy
planetesimal
19. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto
Kuiper belt
The Big Bang Theory
Perihelion
cosmological principle
20. IO
quarks
Most dense
homogeneous
MOONS: most geologically active
21. Centered on the Earth
Geocentric
semimajor axis
Red Giant Branch Star
greehouse effects
22. How did Earth come to have an oxygen rich atmosphere?
CCD
fusion crust
Biologicla life created the recycling of nitrogen - co2 - and the production of oxygen. Oxygen is heavier so the atmosphere held onto it easier than hydrogen and helium.
MOONS: most geologically active
23. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula
Plank's Law
reflection star clusters
Synodic Day
Ganymede (Jupiter)
24. A repeated - periodic push or pull capable of summing into a larger push or pull
Turn off Point
resonance
Brown dwarf
great red spot
25. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)
self-propagating star formation
greatest elongation
High Velocity Stars
Electromagnetic Radiation
26. A subatomic particle with a negative charge. It creates light.
Annular Eclipse
Electron
White Dwarf
Magnification
27. The source of the force that is accelerating the expansion rate of the universe.
Black Hole
dark energy
most moons
Planetary Nebula
28. First accurately measured the speed of light in a vacuum
Photon
Ole Roemer
We don't know. It might be but does not have to be.
Galilean satellite
29. The point in its orbit where a planet is nearest the sun
Vernal Equinox
Perihelion
semimajor axis
self-propagating star formation
30. The displacement of spectral lines to redder colors caused by the expansion of the universe.
cosmological red shift
Kirchhoff's Law
opposition
asteroid
31. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.
Black Hole
Vernal Equinox
synchronous rotation
chemical differentiation
32. Matter that reveals itself only through its gravitational attraction
highlands
matter dominated universe
Dark Matter
rotation curve=winding dilemma?
33. The lens in a telescope used to determine the magnification
Gravitational Lens
Triple Alpha rocess
Celestial Sphere
Eyepiece Lens
34. A star that is burning hydrogen to helium in a shell surrounding it's core
planetary nebula
Red Giant Branch Star
Absorption Spectrum
Molecular Clouds
35. The number of protons in an atom.
Callisto (Jupiter)
Roundest orbit
Shepherd satellite
Atomic Number
36. Radiation given off by electrons accelerating in a magnetic field
MOONS: larger than mercury
Synchrotron Rotation
acceleration
fastest rotation
37. Jupiter
fastest rotation
Big Bang
Metals
shape and color of SPIRAL galaxies
38. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.
quarks
density waves
fewest moons
Resolving Power
39. The apparent backward motion of a planet against the background of stars.
retrograde motion
Quasar
semimajor axis
Spectral Lines
40. The 'edge' of the universe. Light beyond this has not reached us yet.
partile horizon
Electromagnetic Radiation: Gamma Ray
Light Pollution
Emission Spectrum
41. The entity responsible for spiral arms in grand-design spiral galaxies
Active Optics
Density Wave
Colestial Pole
shape and color of ELLIPTICAL galaxies
42. The relation that tells how light dims with distance.
Inverse Square Law
terrestrial planet
Spectral Lines
least dense
43. An element of a highly efficient - two-dimensional electronic light detector
Flat - Flat
Pixel
Bok Globule
Light Gathering Power
44. 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
Maria
Inverse Square Law
Positive - Converge - Greater than 1
45. A change in the appearance of the sun at the edge of the solar disk
Doppler Shift
Autumnal Equinox
Limb darkening
Flat - Flat
46. A telescope that uses lenses to focus light
MOONS: thickest atmosphere
nucleus
Refractor
Light-Year
47. The science of measuring the apparent magnitudes of stars by imaging them through different filters.
Photometry
Wein's Law
It does not have to expand into anything. It might just be that the 3 dimensions of space are getting bigger. It may also be that our 3 spatial dimensions are expanding into higher dimensions if such things exist.
Limb darkening
48. 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
49. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)
critical density
blazar
Planck time
Make up of the terrestrial planets
50. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.
semimajor axis
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
Particle Horizon
Cepheid Variable