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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 rotation period of the Earth measured relative to the stars.
planetesimal
Sidereal Day
Doppler Shift
CNO Cycle
2. Venus
Eclipses of the Moons of Jupiter
Photometry
Ground State
Thickest atmosphere
3. Large nebula consisting of very cold gas and dust
Molecular Clouds
A family of radiant energy- includes light
Astronomical Unit
Positive - Converge - Greater than 1
4. A galaxy emitting large amounts of energy at long wavelengths.
Neutron Star
MOONS: largest size
radio galaxy
Black Hole
5. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies
Rich vs poor clusters
Vernal Equinox
Titus-Bode Law
Eyepiece Lens
6. The mirror that determines the focus configuration of a reflector
Terrestrial Planets
hottest surface
Secondary Mirror
matter dominated universe
7. A logarithmically scaled value for the measured brightness of a star.
H2 Regions
Ammonia - methane - and water
Apparent Magnitude
Geocentric
8. Europa
Coronal Loop
Electromagnetic Radiation: Gamma Ray
MOONS: roundest shape
weight
9. The science of measuring light energy by wavelength.
Prominence
Spectroscopy
Hubble constant
semimajor axis
10. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.
mapping the structure of Milky Way disk
The Big Bang Theory resolves Olber's Paradox
greatest elongation
A family of radiant energy- includes light
11. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker
300000 KM/sec
Seyfert galaxy
belt
Void
12. How is the Hubble Law consistent with an expanding universe?
Terrestrial Planets
Interstellar Extinction
Zenith
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.
13. When massive objects bend space and time enough to create multiple images of an object located behind them
tectonics of Venus
blazar
Gravitational Lens
Sa spiral galaxy
14. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)
Plague
MOONS: largest size
Reflector
greatest elongation
15. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto
cosmological red shift
conjunction
Kuiper belt
MOONS: roundest shape
16. The most mass a white dwarf can have before collapsing to a neutron star
Limb darkening
accretion disk
Chandrasekhar Limit
Electromagnetic Radiation: Gamma Ray
17. What are the three possible geometries of the universe?
Milky way Galaxy
Absorption Spectrum
Open - flat - and closed.
Turn off Point
18. A faint - remarkably uniform distribution of radiation in space
Cosmic Microwave Background
3 reasons we orbit satellites to observe universe
rotation curve = dark matter?
Sunspot cycle
19. A very dense - highly populated cluster of galaxies
Rich Cluster
hottest surface
MOONS: roundest shape
Vernal Equinox
20. Venus (retrograde)
Gravitational Lens
Quasar
Meridian
slowest rotation
21. The lowest energy of an atom.
Magnification
Ground State
Ganymede (Jupiter)
Asymptotic giant Branch Star
22. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.
shape and color of ELLIPTICAL galaxies
Cosmic Microwave Background (CMB)
isotropic
meteor
23. 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
Chromosphere
Ole Roemer
disk
Hydrostatic Equilibrium
24. A small spherical dark nebula
Bok Globule
fusion crust
aphelion
Photometry
25. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)
OB Associations
Brown dwarf
general star population
radio galaxy
26. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction
interstellar dust
Primary Mirror
Apollo asteroids
Light Pollution
27. A continuous spectrum of light missing energy at a few wave lengths.
Liquid metallic hydrogen
Absorption Spectrum
HII Region
Coldest surface
28. A planet that is farther from the sun than the Earth is
Superior planets
Limb darkening
plate tectonics
chemical differentiation
29. The process that powers the sun and hydrogen bombs
We don't know. It might be but does not have to be.
dark matter
retrograde motion
Thermonuclear Fusion
30. 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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31. The apparent path of the Sun through the stars on the celestial sphere.
interstellar dust
Titus-Bode Law
Ecliptic
The Local Group
32. The process of acquiring material
Geocentric
accretion
Black Hole
Annular Eclipse
33. Milky way galaxy is a member - a small poor cluster-about 30 galaxies
The Local Group
Nucleus
Spectral Lines
nova
34. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)
3 reasons we orbit satellites to observe universe
anorthosite
greatest elongation
Brown dwarf
35. The rock that makes up the lunar maria
Halo
mare basalt
Dark matter candidates
Inverse Square Law
36. An object that may remain after a star explodes
Big Bang
Planetary Nebula
Neutron Star
Magnification
37. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.
Nucleus
Vernal Equinox
Shepherd satellite
Halo
38. The entity responsible for spiral arms in grand-design spiral galaxies
Density Wave
Olber's paradox
Doppler Shift
Secondary Mirror
39. Jupiter - Saturn - Uranus - Neptune
superclusters
The Big Bang Theory resolves Olber's Paradox
We don't know. It might be but does not have to be.
Jovian Planets
40. A small chunk of rock in space
Cassini division
Differential Rotation
Flat - Remain Parallel - Exactly 1
meteoriod
41. The number of protons in an atom.
Focal Length
Horizontal Branch Star
Photosphere
Atomic Number
42. The law that predicts the possible types of spectra.
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43. 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.
weight
Coldest surface
Open Cluster
44. An element of a highly efficient - two-dimensional electronic light detector
standard candle
Kirchhoff's Law
Pixel
MOONS: larger than mercury
45. The location around an atom where an electron resides.
Prominence
Apollo asteroids
Most dense
Energy Level
46. The mix of pure photon energy that emerged at the start of the universe.
weight
cosmic fireball
Photon
Sidereal Day
47. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR
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.
Kirkwood gaps
supernova
weight
48. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu
Red Giant Branch Star
Absolute Magnitude
How is winding dilemma solved?
Cepheid variables
49. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object
accretion disk
CNO Cycle
Ole Roemer
fusion crust
50. A star that is burning hydrogen to helium in a shell surrounding it's core
Electron
Grand design spirals
Red Giant Branch Star
Ammonia - methane - and water