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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. Comglomerates of ice and rock that orbit the sun in highly elliptical paths
comet
Pulsar
highlands
Nova
2. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.
Disk
Electromagnetic Radiation
Grand design spirals
interstellar dust
3. Possible Fates of the Universe
MOONS: most geologically active
Planck time
Limb darkening
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
4. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.
White Dwarf
Total Eclipse
Halo
open star clusters
5. A bright area of higher temperature that often proceeds the formation of sunspots.
least dense
rotation curve = dark matter?
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.
Plague
6. The law that describes the blackbody curve - and let to quantum mechanics.
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7. A method of finding a star's distance from its absolute magnitude and spectral type or color.
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
Spectroscopic Parallax
isotropic
Rich Cluster
8. The rock that makes up the lunar highlands
Energy Level
homogeneous
Absolute Magnitude
anorthosite
9. A word used in astronomy to describe all elements besides hydrogen and helium
Metals
general star population
We don't know. It might be but does not have to be.
Inverse Square Law
10. A word used in astronomy to describe all elements besides hydrogen and helium
Metals
Cepheid variables
Coronal Loop
Granules
11. A prominence seen against the disk of the sun
Main Sequence Stars
Cosmic Microwave Background
Filament
Kuiper belt
12. A prominence seen against the disk of the sun
open star clusters
Filament
Chandrasekhar Limit
Spectroscopy
13. Possible Fates of the Universe
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
Shepherd satellite
meteor
quasar
14. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto
Lagrangian Razor
Ground State
Kuiper belt
Active Optics
15. In Ptolemy's geocentric solar system - the small circle on which a planet moved.
The Local Group
epicycle
Gamma-ray Burst
3 reasons we orbit satellites to observe universe
16. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc
critical density
jovian
Dwarf planets
Roundest orbit
17. Hydrogen and helium (mainly)
Ole Roemer
Make up of the jovian planets
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Roundest orbit
18. Mercury
superclusters
radiation dominated universe
smallest diameter
Filament
19. The distance a moon can be from a planet before shattering from tidal forces
roche limit
Make up of the jovian planets
A family of radiant energy- includes light
Synodic Day
20. The displacement of spectral lines to redder colors caused by the expansion of the universe.
Oort Cloud
Interstellar Extinction
Inverse Square Law
cosmological red shift
21. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)
asteroid
Penumbra
scarp
greatest elongation
22. The point in its orbit where a planet is farthest from the sun
Apparent Magnitude
Electromagnetic Radiation
Chandrasekhar Limit
aphelion
23. Centered on the Earth
Geocentric
Apollo asteroids
Doppler Shift
Eclipses of the Moons of Jupiter
24. The dark - relativley smooth areas on the moon; Latin for sea
Sa spiral galaxy
Dwarf planets
Maria
Plank's Law
25. The area behind a lens where images are resolved
Focal Plane
Void
Supercluster
critical density
26. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE
Dwarf planets
isotropic
CCD
Callisto (Jupiter)
27. Europa
Radiative Diffusion
radio galaxy
MOONS: roundest shape
Clouds of sufuric acid (very inhospitable and brightest object in the sky) - process called greenhouse affect traps radiation making it 900 degrees at times - spins with retrograde rotation (sun rises in west) and takes 58.4 days for it to set. Thick
28. 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.
Bulge
Light Pollution
tectonics of Venus
rotation curve=winding dilemma?
29. Is there water on the moon?
Yes - frozen at the poles- remains protected from the suns rays
Europa (Jupiters moon)
Gamma-ray Burst
Sa spiral galaxy
30. The part of the Milky way that has on-going star formation
CNO Cycle
blazar
Convection
Disk
31. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.
evidence of water on mars
gravity
Meridian
Sunspot cycle
32. A planet that is closer to the sun than the earth
Hipparchus
inferior planets
Electromagnetic Radiation: Visible Light
Cepheid Variable
33. The amount an image is enlarged by a telescope
widmanstatten pattern
chemical differentiation
Magnification
Cepheid Variable
34. Dark - reddish - low-pressure bands in Jupiter's atmosphere
belt
mare basalt
Thermonuclear Fusion
Maria
35. A collection of galaxies like the one the Milky Way belongs to
Eclipses of the Moons of Jupiter
Light Pollution
Poor Cluster
cosmic fireball
36. When the Sun is farthest south of the celestial equator (About December 22)
radiant
reflection star clusters
Bok Globule
Winter Solstice
37. 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
tectonics of Venus
direct motion
reflection star clusters
Occam's razor
38. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.
CMB
Metals
Gravitational Lens
Poor Cluster
39. The apparent backward motion of a planet against the background of stars.
retrograde motion
density parameter
tectonics of Mars
radio galaxy
40. The light produced when particles from the sun collide with atmospheric molecules
rotation curve = dark matter?
Spectral Lines
Cosmological Principle
aurora
41. A star that erratically and explosively brightens and dims
Triple Alpha rocess
Dark matter candidates
Nova
mare basalt
42. Mercury - Venus - Earth - Mars
rotation curve = dark matter?
Terrestrial Planets
era of recombination
Molecular Clouds
43. Small moons that maintain the shape of rings around Saturn and Uranus
Shepherd satellite
Cosmic Microwave Background (CMB)
synchronous rotation
comet
44. Infinitely long -> 10 cm
Electromagnetic Radiation: Radio
Population 1 vs Population 2 stars
Drake equation
Sunspots
45. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.
If it is in a denser medium - such as glass - it will move slower
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.
Pulsar
Gamma ray bursts
46. Is space infinitely large?
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47. A force exerted by reflecting sunlight
Flat - Flat
MOONS: larger than mercury
radiation pressure
deferent
48. A term referring to Earth-like planets
Coldest surface
Total Eclipse
Continuous Spectrum
terrestrial planet
49. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.
anorthosite
Clouds of sufuric acid (very inhospitable and brightest object in the sky) - process called greenhouse affect traps radiation making it 900 degrees at times - spins with retrograde rotation (sun rises in west) and takes 58.4 days for it to set. Thick
Halo
hottest surface
50. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.
synchrotron radiation
Globular Cluster
direct motion
Big Bang