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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. A rock or iron specimen that has fallen from space
retrograde motion
meteorite
Main Sequence Stars
Main Sequence
2. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction
Io (jupiters moon)
interstellar dust
Most dense
Photometry
3. The gap etween saturn's A and B rings
Ganymede (Jupiter)
Cassini division
Gravitational Lens
Sunspot cycle
4. Centered on the Earth
Plague
Geocentric
critical density
Spectroscopy
5. Venus (retrograde)
How is winding dilemma solved?
Energy Level
opposition
slowest rotation
6. The most mass a white dwarf can have before collapsing to a neutron star
Plague
Precession
Electron
Chandrasekhar Limit
7. 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
Chandrasekhar Limit
semimajor axis
Hydrostatic Equilibrium
bulge
8. The distance between a lens and its focal plane
Maria
Focal Length
Ole Roemer
Gamma ray bursts
9. Either Io -Europa - Ganymede - or Callisto
Galilean satellite
Vernal Equinox
Ground State
Main Sequence
10. The fusion process that turns three helium nuclei into a carbon nucleus
Energy Level
Triple Alpha rocess
Stephen-Boltzman Law
Spectral Lines
11. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes
Quasar
quarks
meteoriod
Sc spiral galaxy
12. The movement of the Earth's crustal plates riding on top of the mantle.
Light Pollution
Annular Eclipse
plate tectonics
Celestial Sphere
13. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t
tectonics of Mars
meteorite
Spectroscopic parallax
The Big Bang Theory resolves Olber's Paradox
14. The law stating that hotter blackbodies look bluer than cooler blackbodies.
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15. The wavelengths where a specific element can absorb or emit light.
reflection star clusters
Spectral Lines
Electromagnetic Radiation: Ultraviolet Light
Doppler Shift
16. The light produced when particles from the sun collide with atmospheric molecules
aurora
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.
rotation curve = dark matter?
meteor
17. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies
Neutron Star
Nebula
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
difference between maria and highlands of the moon.
18. The area behind a lens where images are resolved
Cosmological Principle
Focal Plane
We don't know. It might be but does not have to be.
thinnest atmosphere
19. The lens that gathers the light in a refractor
Objective Lens
Nucleus
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.
Asymptotic giant Branch Star
20. When a planet lines up with the sun inthe sky
Resolving Power
mapping the structure of Milky Way disk
conjunction
Seeing
21. Ganymede
E=mc2
Extrasolar Planet
SETI
MOONS: largest size
22. That which is responsible for Jupiter's magnetic field
chondrite
Liquid metallic hydrogen
High and low pressure which stretch into bands due to the rapid differential rotation. deeper - darker colors are in the belts and zones are lighter
semimajor axis
23. 10 cm -> 1 mm
Chandrasekhar Limit
Electromagnetic Radiation: Microwave
Galilean satellite
Penumbra
24. A volume of space where few - if any - galaxies are located
How is winding dilemma solved?
shape and color of SPIRAL galaxies
Void
Dwarf planets
25. 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 _____.
synchronous rotation
Flat - Remain Parallel - Exactly 1
standard candle
CCD
26. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)
direct motion
H2 Regions
Rich Cluster
Particle Horizon
27. A very dense - highly populated cluster of galaxies
Molecular Clouds
CMB
Rich Cluster
Chandrasekhar Limit
28. 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.
Molecular Clouds
Most dense
Nucleus
Turn off Point
29. The science of measuring the apparent magnitudes of stars by imaging them through different filters.
Photometry
critical density
cosmological principle
CNO Cycle
30. A small spherical dark nebula
Refractor
Milky way Galaxy
meteor shower
Bok Globule
31. An evolved star - past the helium flash that is burning helium to carbon in it's cores
Horizontal Branch Star
Red Giant Branch Star
Cepheid Variable
fastest rotation
32. The area behind a lens where images are resolved
direct motion
Focal Plane
Main Sequence Stars
Metals
33. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object
mass
inferior planets
Sunspots
Radiative Diffusion
34. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)
shape and color of SPIRAL galaxies
Largest diameter
Dark matter candidates
Eyepiece Lens
35. All possible types of energy that can be emitted and absorbed by atoms.
contrast northern lowlands and the southern highlands of mars...
differential rotation
Electromagnetic Radiation
Refractor
36. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere
Colestial Pole
Active Optics
superclusters
semimajor axis
37. Mercury - Venus - Earth - Mars
Hyashi track
Precession
mapping the structure of Milky Way disk
Terrestrial Planets
38. The crust of a meteorite caused by its entry into Earth's atmosphere
fusion crust
disk
MOONS: largest size
zone
39. A faint - remarkably uniform distribution of radiation in space
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
Cosmic Microwave Background
coma
Magnification
40. Then the Sun moves from north to south across the celestial equator (about September 23)
Electromagnetic Radiation: Gamma Ray
Autumnal Equinox
great dark spots
Apparent Magnitude
41. The oldest part of the Milky Way
partile horizon
Halo
hottest surface
Electromagnetic Radiation
42. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting
differential rotation
anorthosite
Big Crunch
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
43. A long-lived high-pressure bulge in Jupiter's southern hemisphere
Flare
synchronous rotation
great red spot
Radio Galaxy
44. The place in the sky that the Earth's axis points toward (can be either north or south)
acceleration
Light Curve
Flare
Colestial Pole
45. A term referring to Jupiter-like planets
jovian
disk
Sunspots
evidence of water on mars
46. The law that syas light energy from a blackbody increases as (temperature^4)
cosmology
synchronous rotation
Absorption Spectrum
Stephen-Boltzman Law
47. When material is heated and moves taking the heat energy with it
Convection
Active Optics
Light Gathering Power
Sb spiral galaxy
48. Any change in the speed or direction of an object's motion
Ionization
Celestial Sphere
Electromagnetic Radiation: Microwave
acceleration
49. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)
retrograde motion
cosmic fireball
MOONS: most geologically active
quasar
50. An empirical scheme for predictin ghe orbital distances of planets
Dark Matter
Titus-Bode Law
Big Crunch
Light Gathering Power