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Test your basic knowledge |
Cosmology
Start Test
Study First
Subject
:
science
Instructions:
Answer 50 questions in 15 minutes.
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.
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. What Ole Roemer used to measure the speed of light in a vacuum
Roundest orbit
Eclipses of the Moons of Jupiter
Seyfert galaxy
Brown dwarf
2. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE
Io (jupiters moon)
most eccentric orbit
meteor
meteor shower
3. 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
superclusters
Callisto (Jupiter)
Ammonia - methane - and water
4. The rate of expansion of the universe.
density waves
Neutron Star
Hubble constant
Cosmological Principle
5. Why does the earth have few craters while the moon has many?
Bulge
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Superior planets
White Dwarf
6. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
Vernal Equinox
MOONS: roundest shape
Sc spiral galaxy
Europa (Jupiters moon)
7. The location around an atom where an electron resides.
Energy Level
Asymptotic giant Branch Star
regolith
Disk
8. The oldest terrain on the moon
Continuous Spectrum
direct motion
great red spot
highlands
9. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.
Globular Cluster
Main Sequence
cosmological principle
Winter Solstice
10. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)
How is winding dilemma solved?
Hipparchus
Electromagnetic Radiation: X-Ray
Horizontal Branch Star
11. The process that powers the sun and hydrogen bombs
Ionization
Thermonuclear Fusion
Steady State Theory (Leads to Olber's Paradox)
rotation curve=winding dilemma?
12. A massive variable star used to find distances to the galaxies or clusters that contain them.
Nebula
Cepheid Variable
Plague
Maria
13. 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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14. What Ole Roemer used to measure the speed of light in a vacuum
Eclipses of the Moons of Jupiter
Extrasolar Planet
Turn off Point
A family of radiant energy- includes light
15. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.
Make up of the terrestrial planets
Active Optics
accretion disk
Main Sequence
16. A huge sphere of tenuous gas surrounding the nucleus of a comet
meteor
self-propagating star formation
coma
tectonics of Venus
17. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object
Halo
rotation curve=winding dilemma?
mass
White Dwarf
18. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)
roche limit
blazar
Reflector
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.
19. Very center of galaxy. suggestion of a black hole
Sc spiral galaxy
HII Region
radio galaxy
nucleus
20. Centered on the Earth
cosmic fireball
Resolving Power
Geocentric
Big Crunch
21. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.
Radio Galaxy
shape and color of SPIRAL galaxies
Dwarf planets
Supernova (You can be my supernova girl)
22. An object that may remain after a star explodes
Prominence
Neutron Star
The Local Group
Winter Solstice
23. A faint - remarkably uniform distribution of radiation in space
Cosmic Microwave Background
Electromagnetic Radiation: Ultraviolet Light
Electromagnetic Radiation: Ultraviolet Light
Dark Nebula
24. When particles are compressed to an unnatural state where their pressure is not related to their temperature
Absorption Spectrum
Degeneracy
Supernova (You can be my supernova girl)
tectonics of Venus
25. The relation that tells how light dims with distance.
Hubble law
cosmological principle
Focal Length
Inverse Square Law
26. The normal eastward movement of a planet against the background of hte distant stars.
great red spot
Light Pollution
Perihelion
direct motion
27. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)
Thermonuclear Fusion
Dark matter candidates
The Local Group
Make up of the jovian planets
28. The 'edge' of the universe. Light beyond this has not reached us yet.
Atomic Number
slowest rotation
aphelion
partile horizon
29. The seasonal shifting of a nearby star's position relative to more distant objects.
Turn off Point
Parallax
Interstellar Extinction
Reflector
30. Small moons that maintain the shape of rings around Saturn and Uranus
Open - flat - and closed.
Shepherd satellite
Celestial Sphere
Nova
31. When the Sun moves from south to north across the celestial equator (about March 21)
The Big Bang Theory
Spectroscopic Parallax
Planetary Nebula
Vernal Equinox
32. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.
least dense
Ionization
asteroid
Turn off Point
33. 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)
Neutron Star
quarks
Winter Solstice
general star population
34. Milky way galaxy is a member - a small poor cluster-about 30 galaxies
fusion crust
The Local Group
Spectroscopic Parallax
terrestrial planet
35. The rate of expansion of the universe.
Sidereal Day
Hubble constant
density
Emission Spectrum
36. A two-filter measure of the color - and hence temperature - of a star.
Poor Cluster
hottest surface
Black Hole
Color Index
37. A high-pressure bulge in Neptune's southern hemisphere
Granules
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.
great dark spots
Plank's Law
38. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.
Electron
radiation dominated universe
Jupiters red spot
Light Gathering Power
39. Matter so dense that even light cannot escape its gravity
Black Hole
White Dwarf
Spectroscopic parallax
rotation curve = dark matter?
40. Large nebula consisting of very cold gas and dust
blazar
Molecular Clouds
Oort cloud
Ammonia - methane - and water
41. A small chunk of rock in space
Proton-proton chain
direct motion
Kirkwood gaps
meteoriod
42. Mercury
Hubble law
smallest diameter
Ground State
Secondary Mirror
43. A repeated - periodic push or pull capable of summing into a larger push or pull
resonance
differential rotation
Sunspots
nova
44. Hot cells of gas that rise and fall in the hotosphere
We don't know. It might be but does not have to be.
Sidereal Day
E=mc2
Granules
45. 100 nm 10 nm
Kirchhoff's Law
hottest surface
Electromagnetic Radiation: Ultraviolet Light
Cepheid variables
46. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.
3 reasons we orbit satellites to observe universe
Light: travels like a wave - detected like a particle
Electromagnetic Radiation
mare basalt
47. 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
Synchrotron Rotation
Cepheid variables
Electromagnetic Radiation
solar nebula
48. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals
Photon
Magnification
asteroid
radio galaxy
49. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation
AGN
tectonics of Mars
density waves
Spectroscopic Parallax
50. Why do Galaxies move very rapidly in the interiors of the dense clusters?
Photosphere
Blackbody Curve
Stephen-Boltzman Law
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
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