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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. When one side of a body always faces the planet it revolves around
Nucleus
cosmological principle
synchronous rotation
nucleus
2. The location of a supermassive black hole
dark matter
Nucleus
Cosmic Microwave Background
Meridian
3. In Ptolemy's geocentric solar system - the small circle on which a planet moved.
Brown dwarf
Hydrostatic Equilibrium
scarp
epicycle
4. The location around an atom where an electron resides.
Big Crunch
cosmic fireball
Energy Level
homogeneous
5. Is there water on the moon?
rotation curve = dark matter?
Nova
standard candle
Yes - frozen at the poles- remains protected from the suns rays
6. The sinking of denser elements to the center of a young molten planet
chemical differentiation
disk
In an expanding universe all galaxies see all other galaxies that are not gravitationally bound to them receding away. This is what we see in the Hubble Law. We infer that the Hubble law also holds true for all other galaxies.
Total Eclipse
7. A push or a pull
Penumbra
zone
force
Sunspots
8. A point in the sky where meteors appear to come from during a shower
Refractor
rotation curve = dark matter?
radiant
Rich vs poor clusters
9. The lowest energy of an atom.
Spectroscopic Parallax
Light Curve
Ground State
Wein's Law
10. Matter that reveals itself only through its gravitational attraction
We don't know. It might be but does not have to be.
Liquid metallic hydrogen
Dark Matter
Plague
11. A term referring to the orbital character of stars near the Sun
Differential Rotation
Cepheid Variable
Quasar
Particle Horizon
12. A planet orbiting about a distant star
We don't know. It might be but does not have to be.
zone
Occam's razor
Extrasolar Planet
13. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation
Gamma-ray Burst
disk
Hubble constant
Perihelion
14. The entity from which the whole universe is postulated to have come from.
thinnest atmosphere
Sc spiral galaxy
cosmic singularity
Photon
15. A small and dim but hot star.
The Big Bang Theory
Seeing
White Dwarf
anorthosite
16. Large nebula consisting of very cold gas and dust
Molecular Clouds
cosmological principle
synchronous rotation
Electromagnetic Radiation: Gamma Ray
17. A representation of the changes in color and brightness of an evolving protostar.
Hyashi track
cosmological red shift
semimajor axis
Electromagnetic Radiation: Ultraviolet Light
18. Form honeycomb like patterns surrounding empty or nearly empty voids.
jovian
Thermonuclear Fusion
superclusters
Nova
19. The distance a moon can be from a planet before shattering from tidal forces
supermassive black hole
roche limit
weight
Oort Cloud
20. The mass of an object divided by its volume
density
We don't know. It might be but does not have to be.
CMB
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
21. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)
Radio Galaxy
Gamma-ray Burst
SETI
quarks
22. A method of finding a star's distance from its absolute magnitude and spectral type or color.
OB Associations
Photometry
Chandrasekhar Limit
Spectroscopic Parallax
23. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast
High Velocity Stars
Population 1 vs Population 2 stars
Parsec
Maria
24. Centered on the Earth
Geocentric
Planck time
Emission Spectrum
Apollo asteroids
25. First accurately measured the speed of light in a vacuum
Ole Roemer
density parameter
Light: travels like a wave - detected like a particle
Planetary Nebula
26. Matter so dense that even light cannot escape its gravity
hottest surface
Halo
Triple Alpha rocess
Black Hole
27. The family of radiant energy that includes light as a subset
Electromagnetic Radiation
scarp
Cosmic Microwave Background
fewest moons
28. A distance measure determined by the shifting of a star against the background sky every 6 months.
Parsec
Disk
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.
Chromosphere
29. 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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30. Approximate speed of light in a vacuum
Rich Cluster
disk
300000 KM/sec
Refractor
31. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals
superclusters
Ganymede (Jupiter)
coma
asteroid
32. The oldest part of the Milky Way
Photon
Cosmological Principle
Halo
Yes - frozen at the poles- remains protected from the suns rays
33. When the Sun is farthest north of the celestial equator (about June 22)
Brown dwarf
radiation dominated universe
Summer Solstice
Hydrostatic Equilibrium
34. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.
blazar
slowest rotation
Halo
Proton-proton chain
35. 10 nm 10^2 nm
Grand design spirals
Stephen-Boltzman Law
High Velocity Stars
Electromagnetic Radiation: X-Ray
36. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker
Blackbody Curve
Cassegrain Focus
Seyfert galaxy
contrast northern lowlands and the southern highlands of mars...
37. Titan
Big Crunch
rotation curve = dark matter?
MOONS: thickest atmosphere
mare basalt
38. 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
Planck time
critical density
Metals
39. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant
Active Optics
Turn off Point
Thermal Equilibrium
aurora
40. The layer of the sun just above the photosphere
Celestial Equator
rotation curve=winding dilemma?
Chromosphere
3 reasons we orbit satellites to observe universe
41. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder
Big Crunch
Electromagnetic Radiation: Ultraviolet Light
shape and color of ELLIPTICAL galaxies
thinnest atmosphere
42. The oldest grouping of stars - found in the galaxy halo
interstellar dust
Blackbody Curve
Globular Cluster
Active Optics
43. Jupiter
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
radiation pressure
fastest rotation
acceleration
44. A term referring to Earth-like planets
jovian
chemical differentiation
Zenith
terrestrial planet
45. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.
supernova
synchrotron radiation
Heliocentric
Magnification
46. What Ole Roemer used to measure the speed of light in a vacuum
Photometry
Cosmic Microwave Background (CMB)
Eclipses of the Moons of Jupiter
disk
47. A large and bright but cool star.
Winter Solstice
rotation curve=winding dilemma?
How is winding dilemma solved?
Red Giant
48. A bright area of higher temperature that often proceeds the formation of sunspots.
Largest diameter
Plague
Sunspots
retrograde motion
49. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core
Electromagnetic Radiation: Infrared
High Velocity Stars
Asymptotic giant Branch Star
Eclipses of the Moons of Jupiter
50. The rock that makes up the lunar highlands
Objective Lens
force
synchronous rotation
anorthosite