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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. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)
Inverse Square Law
Apparent Magnitude
Dark matter candidates
protostar
2. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)
Apparent Magnitude
aurora
Apollo asteroids
Oort cloud
3. 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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4. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.
Nebula
Light Gathering Power
partile horizon
difference between maria and highlands of the moon.
5. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE
Differential Rotation
Electromagnetic Radiation: Gamma Ray
Ganymede (Jupiter)
Synchrotron Rotation
6. The normal eastward movement of a planet against the background of hte distant stars.
direct motion
tectonics of Earth
solar nebula
Grand design spirals
7. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.
Gravitational Lens
synchrotron radiation
Dark matter candidates
Cassini division
8. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.
Black Hole
Dark matter candidates
Hubble constant
Gamma ray bursts
9. A spinning neutron star
Pulsar
Photometry
Photosphere
semimajor axis
10. A star that is burning hydrogen to helium in a shell surrounding it's core
Refractor
Reflector
Focal Plane
Red Giant Branch Star
11. A small and dim but hot star.
Secondary Mirror
White Dwarf
Metals
Precession
12. When one side of a body always faces the planet it revolves around
Geocentric
Filament
accretion
synchronous rotation
13. Electromagnetic Radiation
Hyashi track
A family of radiant energy- includes light
MOONS: most geologically active
Photometry
14. The process similar to conduction by which energy moves from the solar core to the convective layer
Radiative Diffusion
rotation curve = dark matter?
Wein's Law
critical density
15. A planet that is closer to the sun than the earth
inferior planets
Filament
conjunction
condensation temperature
16. The process similar to conduction by which energy moves from the solar core to the convective layer
mare basalt
molecular clouds
Radiative Diffusion
cosmic fireball
17. A planet that is farther from the sun than the Earth is
Superior planets
accretion
Penumbra
Bok Globule
18. The high- temperatature outer layer of the sun
Grand design spirals
cosmological principle
Corona
Drake equation
19. 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 ________.
Colestial Pole
Spectroscopic Parallax
Emission Spectrum
Flat - Flat
20. Mercury
most eccentric orbit
Photon
CNO Cycle
fastest rotation
21. A prominence seen against the disk of the sun
cosmological red shift
planetary nebula
Filament
Yes - frozen at the poles- remains protected from the suns rays
22. A spinning neutron star
Winter Solstice
Pulsar
Globular Cluster
Most dense
23. When the Sun moves from south to north across the celestial equator (about March 21)
H2 Regions
aurora
matter dominated universe
Vernal Equinox
24. The imaginary sphere centered on the Earth that hols the stars.
meteor shower
Dark Nebula
Celestial Sphere
cosmological principle
25. A subatomic particle with a negative charge. It creates light.
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.
Rich vs poor clusters
Electron
gravity
26. When the Moon entirely blocks the Sun.
The Big Bang Theory
Parsec
Total Eclipse
gravity
27. A particle of light.
general star population
Europa (Jupiters moon)
Photon
Big Bang
28. A long-lived high-pressure bulge in Jupiter's southern hemisphere
great red spot
density waves
asteroid
rotation curve = dark matter?
29. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)
Hyashi track
semimajor axis
planetary nebula
shape and color of ELLIPTICAL galaxies
30. A continuous spectrum of light missing energy at a few wave lengths.
Absorption Spectrum
SETI
Photometry
homogeneous
31. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.
Grand design spirals
density waves
Summer Solstice
Supercluster
32. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.
Open - flat - and closed.
Parallax
A family of radiant energy- includes light
Maria
33. A perfect absorber and radiator of electromagnetic radiation.
Ionization
Cosmic Microwave Background (CMB)
Blackbody
Differential Rotation
34. The apparent path of the Sun through the stars on the celestial sphere.
Lagrangian Razor
Secondary Mirror
Ecliptic
Hydrostatic Equilibrium
35. 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
Nova
supernova
H2 Regions
opposition
36. The location around an atom where an electron resides.
mass
Energy Level
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
synchrotron radiation
37. The light produced when particles from the sun collide with atmospheric molecules
Photometry
aurora
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.
cosmic singularity
38. Dark - reddish - low-pressure bands in Jupiter's atmosphere
belt
molecular clouds
Rich Cluster
Open Cluster
39. Jupiter
most moons
critical density
Halo
Self-Propogating Star Formation
40. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.
Parallax
Bok Globule
Penumbra
fastest rotation
41. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years
Milky way Galaxy
Red Giant
Continuous Spectrum
Seyfert galaxy
42. The shadow behind the Earth or Moon where the Sun is partially obscured.
direct motion
Asymptotic giant Branch Star
Supercluster
Penumbra
43. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig
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44. 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 _____.
Electromagnetic Radiation: Ultraviolet Light
differential rotation
Flat - Remain Parallel - Exactly 1
Black Hole
45. A star that erratically and explosively brightens and dims
Nova
Extrasolar Planet
planetary nebula
belt
46. Why do Galaxies move very rapidly in the interiors of the dense clusters?
H2 Regions
Electromagnetic Radiation: Gamma Ray
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
meteor
47. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)
planetary nebula
solar nebula
Radiative Diffusion
Red Giant
48. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)
radiation dominated universe
Sb spiral galaxy
Corona
interstellar dust
49. The shadow area behind the Earth or Moon where the Sun is completely obscured.
Electromagnetic Radiation
Roundest orbit
Umbra
Hydrostatic Equilibrium
50. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals
Planck time
Big Crunch
asteroid
Color Index
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