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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. Jupiter
fastest rotation
Open - flat - and closed.
cosmological principle
Stephen-Boltzman Law
2. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
Positive - Converge - Greater than 1
Secondary Mirror
Open - flat - and closed.
Terrestrial Planets
3. The gap etween saturn's A and B rings
Cassini division
Convection
Degeneracy
bulge
4. The temp at which a substance in the vacuum of space solidifies
scarp
MOONS: thickest atmosphere
condensation temperature
Resolving Power
5. The imaginary sphere centered on the Earth that hols the stars.
Main Sequence Stars
Celestial Sphere
aphelion
Self-Propogating Star Formation
6. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites
Electromagnetic Radiation: Gamma Ray
hottest surface
Dwarf planets
Hubble law
7. Half of the longest diameter across an ellipse
We don't know. It might be but does not have to be.
semimajor axis
aphelion
Electromagnetic Radiation: Ultraviolet Light
8. The telescope configuration that has the focus placed at the back of the primary mirror
Radiative Diffusion
Gamma ray bursts
Ecliptic
Cassegrain Focus
9. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.
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10. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density
density parameter
Electromagnetic Radiation: Microwave
Dark Nebula
synchronous rotation
11. What are the three possible geometries of the universe?
Atomic Number
Planetary Nebula
Absorption Spectrum
Open - flat - and closed.
12. The distance light travels in one year (=9.46x10^12km).
Big Crunch
Dark Matter
Light-Year
smallest diameter
13. A plot of star absolute magnitude verses spectral type.
Yes - frozen at the poles- remains protected from the suns rays
Milky way Galaxy
Europa (Jupiters moon)
H-are Diagram
14. What do we think the actual fate of the universe will be and why do we think this?
Flare
Observations of distant type Ia supernovae indicate that the expansion of the universe is speeding up with time - not slowing down! So there must be a force causing this.
Sunspot cycle
accretion disk
15. The crust of a meteorite caused by its entry into Earth's atmosphere
cosmological principle
Coldest surface
fusion crust
contrast northern lowlands and the southern highlands of mars...
16. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy
Oort cloud
Sb spiral galaxy
Umbra
Io (jupiters moon)
17. 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)
Light: travels like a wave - detected like a particle
Primary Mirror
general star population
Spectroscopy
18. Any change in the speed or direction of an object's motion
Color Index
dark matter
HII Region
acceleration
19. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE
Callisto (Jupiter)
Globular Cluster
shape and color of ELLIPTICAL galaxies
Flat - Flat
20. Approximate speed of light in a vacuum
Brown dwarf
synchronous rotation
300000 KM/sec
Energy Level
21. 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
Coldest surface
Plague
Brown dwarf
22. Material that shoots rapidly out into space. Flares cause Auroras
Gamma ray bursts
Flare
Ionization
cosmic singularity
23. A telescope that uses lenses to focus light
deferent
Apollo asteroids
Refractor
A family of radiant energy- includes light
24. A planet that is farther from the sun than the Earth is
Radiative Diffusion
Instability strip
Superior planets
Big Crunch
25. Elliptical orbits that come inside orbit of the Earth.
Apollo asteroids
radio galaxy
The Big Bang Theory resolves Olber's Paradox
Secondary Mirror
26. 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)
deferent
planetary nebula
Eyepiece Lens
Callisto (Jupiter)
27. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.
Halo
density
open star clusters
Sc spiral galaxy
28. The rate of expansion of the universe.
Light Pollution
Penumbra
Energy Level
Hubble constant
29. When the Sun moves from south to north across the celestial equator (about March 21)
Vernal Equinox
radio galaxy
MOONS: most geologically active
Focal Plane
30. An object that may remain after a star explodes
widmanstatten pattern
Most dense
Red Giant
Neutron Star
31. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)
Emission Spectrum
meteoriod
opposition
Neutron Star
32. The equation that describes how matter equates with energy
Black Hole
E=mc2
weight
Coronal Loop
33. A continuous spectrum of light missing energy at a few wave lengths.
Halo
Absorption Spectrum
AGN
inferior planets
34. 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
Light Curve
era of recombination
Milky way Galaxy
Prominence
35. A star that erratically and explosively brightens and dims
Nova
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
CCD
Filament
36. Mercury
rotation curve = dark matter?
Thermal Equilibrium
thinnest atmosphere
Light Curve
37. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies
supermassive black hole
Halo
Europa (Jupiters moon)
Nebula
38. 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
Void
Colestial Pole
Cepheid variables
Density Wave
39. The location around an atom where an electron resides.
radio lobe
Kuiper belt
Energy Level
coma
40. A phenomenon seen when the Earth passes through the orbit of a burned out comet
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Trojan asteroids
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.
meteor shower
41. A term referring to Jupiter-like planets
Kuiper belt
jovian
Brown dwarf
planetary nebula
42. A method of finding a star's distance from its absolute magnitude and spectral type or color.
conjunction
Ground State
density waves
Spectroscopic Parallax
43. The organization of clusters of galaxies into sheets and strings
Supercluster
Zenith
gravity
Io (jupiters moon)
44. Centered on the sun.
Roundest orbit
Bok Globule
Resolving Power
Heliocentric
45. 10 nm 10^2 nm
Electromagnetic Radiation: X-Ray
Apparent Magnitude
Interstellar Extinction
density parameter
46. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape
bulge
Synchrotron Rotation
Pixel
Make up of the terrestrial planets
47. The surface of the sun
Electromagnetic Radiation: Visible Light
Photosphere
Sidereal Day
Reflector
48. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
Lagrangian Razor
interstellar dust
conjunction
Sc spiral galaxy
49. All possible types of energy that can be emitted and absorbed by atoms.
Energy Level
Dwarf planets
Electromagnetic Radiation
Synodic Day
50. The shadow area behind the Earth or Moon where the Sun is completely obscured.
Umbra
Neutron Star
Titus-Bode Law
Black Hole