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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. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.
Make up of the jovian planets
Triple Alpha rocess
density waves
Photon
2. A star that is burning hydrogen to helium in a shell surrounding it's core
Heliocentric
mass
dark matter
Red Giant Branch Star
3. When a planet lines up with the sun inthe sky
conjunction
supernova
Callisto (Jupiter)
Photon
4. Mercury and venus
MOONS: roundest shape
general star population
fewest moons
Flat - Flat
5. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.
Parallax
Enke gap
Titus-Bode Law
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
6. The measure of a variable star's apparent magnitude as it brightens and dims with time
Light Curve
Spectroscopy
Corona
Roundest orbit
7. Saturn
Prominence
least dense
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Perihelion
8. The elementary building blocks from which protons and neutrons are formed.
Sunspot cycle
difference between maria and highlands of the moon.
Parallax
quarks
9. The dimming of starlight by intervening dust
Focal Length
Supernova (You can be my supernova girl)
Interstellar Extinction
Radiative Diffusion
10. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.
The Big Bang Theory
Negative - Diverge - Less than 1
Oort cloud
Spectroscopy
11. A representation of the changes in color and brightness of an evolving protostar.
Hyashi track
Maria
Electromagnetic Radiation: Microwave
Absorption Spectrum
12. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.
Turn off Point
Astronomical Unit
opposition
Disk
13. A bright area of higher temperature that often proceeds the formation of sunspots.
Photosphere
Cepheid variables
Plague
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.
14. A continuous spectrum of light missing energy at a few wave lengths.
Absorption Spectrum
isotropic
general star population
smallest diameter
15. The point directly overhead.
Zenith
tectonics of Earth
Gamma ray bursts
Rich Cluster
16. The process similar to conduction by which energy moves from the solar core to the convective layer
tectonics of Venus
hottest surface
Radiative Diffusion
density parameter
17. Mercury and venus
meteor
CMB
fewest moons
Chandrasekhar Limit
18. The crust of a meteorite caused by its entry into Earth's atmosphere
Light: travels like a wave - detected like a particle
fusion crust
cosmic fireball
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.
19. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.
Radio Galaxy
CCD
direct motion
molecular clouds
20. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes
most moons
Quasar
Gamma ray bursts
quarks
21. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.
Flat - Flat
Largest diameter
Energy Level
Gravitational Lens
22. Form honeycomb like patterns surrounding empty or nearly empty voids.
Poor Cluster
Hipparchus
superclusters
MOONS: roundest shape
23. First accurately measured the speed of light in a vacuum
Planetary Nebula
Ole Roemer
mass
MOONS: thickest atmosphere
24. The location around an atom where an electron resides.
Hubble constant
Astronomical Unit
Energy Level
Autumnal Equinox
25. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p
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26. The location of a supermassive black hole
cosmological principle
Nucleus
Coronal Loop
Apparent Magnitude
27. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting
contrast northern lowlands and the southern highlands of mars...
Big Crunch
Yes - frozen at the poles- remains protected from the suns rays
White Dwarf
28. The equation that describes how matter equates with energy
Cassegrain Focus
E=mc2
Liquid metallic hydrogen
radiation pressure
29. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)
deferent
quasar
Convection
Rich Cluster
30. The source of the force that is accelerating the expansion rate of the universe.
most eccentric orbit
disk
dark energy
Winter Solstice
31. A star fusing hydrogen to helium in it's core
radiant
Sunspot cycle
MOONS: thickest atmosphere
Main Sequence Stars
32. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy
Radio Galaxy
Cosmic Microwave Background
Sb spiral galaxy
Terrestrial Planets
33. The layer of the sun just above the photosphere
Chromosphere
Refractor
Cosmological Principle
Eyepiece Lens
34. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.
Gamma ray bursts
Photon
meteor shower
anorthosite
35. IO
Spectroscopic Parallax
MOONS: most geologically active
Poor Cluster
Largest diameter
36. The north-south line passing directly overhead through the zenith.
Meridian
radio lobe
radio galaxy
Color Index
37. How did Earth come to have an oxygen rich atmosphere?
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.
Callisto (Jupiter)
Planck time
Light Curve
38. Poitns of gravitational stability in the orbit of a planet
Lagrangian Razor
Big Bang
Kuiper belt
Gamma ray bursts
39. Ganymede
contrast northern lowlands and the southern highlands of mars...
MOONS: largest size
Roundest orbit
Molecular Clouds
40. Light scattered through the atmosphere that degrades astronomical images
Dwarf planets
Light Pollution
Big Crunch
reflection star clusters
41. An empirical scheme for predictin ghe orbital distances of planets
meteor
Titus-Bode Law
Hydrostatic Equilibrium
Europa (Jupiters moon)
42. The apparent path of the Sun through the stars on the celestial sphere.
Dark Nebula
Hydrostatic Equilibrium
Ecliptic
Blackbody
43. A word meaning 'the same in all directions.'
The Big Bang Theory
isotropic
Thermonuclear Fusion
A family of radiant energy- includes light
44. 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.
Particle Horizon
planetesimal
Emission Spectrum
general star population
45. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)
H2 Regions
Cosmological Principle
Electron
Flare
46. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker
Seyfert galaxy
Sc spiral galaxy
Cassini division
disk
47. Ganymede and Titan
Electromagnetic Radiation
Ammonia - methane - and water
MOONS: larger than mercury
Eyepiece Lens
48. A star that is burning hydrogen to helium in a shell surrounding it's core
Cosmic Microwave Background
Red Giant Branch Star
hottest surface
Radiative Diffusion
49. When a planet lines up with the sun inthe sky
conjunction
Spectroscopy
Apollo asteroids
Halo
50. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)
The Big Bang Theory
Planck time
OB Associations
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