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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 perfect absorber and radiator of electromagnetic radiation.
Horizontal Branch Star
Blackbody
Gamma-ray Burst
H-are Diagram
2. 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.
Superior planets
Supercluster
Particle Horizon
Make up of the jovian planets
3. A huge sphere of tenuous gas surrounding the nucleus of a comet
CCD
coma
Supernova (You can be my supernova girl)
Milky way Galaxy
4. The act of removing an electron from an atom.
Ionization
Bulge
Light: travels like a wave - detected like a particle
Kirkwood gaps
5. The seasonal shifting of a nearby star's position relative to more distant objects.
Parallax
meteor shower
Atomic Number
Limb darkening
6. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
fewest moons
Density Wave
Jupiters red spot
Sc spiral galaxy
7. 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.
Parallax
Cosmological Principle
Cosmic Microwave Background (CMB)
Summer Solstice
8. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids
direct motion
Kirkwood gaps
protostar
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
9. The projection of the Earth's equator onto the celestial sphere.
Celestial Equator
chemical differentiation
bulge
Prominence
10. 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
Oort cloud
Parallax
standard candle
bulge
11. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter
Flocculent spirals
Sunspot cycle
Europa (Jupiters moon)
neutrino
12. A bridge of material held in position above the solar surface. They can remain for hours even days
Most dense
Prominence
E=mc2
Total Eclipse
13. 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 _____.
Flat - Remain Parallel - Exactly 1
meteorite
standard candle
belt
14. A subatomic particle with a negative charge. It creates light.
chondrite
cosmic singularity
Electron
Quasar
15. The science of measuring the apparent magnitudes of stars by imaging them through different filters.
Parallax
Rich vs poor clusters
tectonics of Mars
Photometry
16. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies
accretion
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.
Rich vs poor clusters
Population 1 vs Population 2 stars
17. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?
accretion disk
Enke gap
Light-Year
If it is in a denser medium - such as glass - it will move slower
18. A plot of star absolute magnitude verses spectral type.
Energy Level
mapping the structure of Milky Way disk
H-are Diagram
cosmological red shift
19. Mercury
Parallax
smallest diameter
critical density
shape and color of ELLIPTICAL galaxies
20. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.
self-propagating star formation
Main Sequence
Molecular Clouds
opposition
21. A word meaning 'the same in all directions.'
most eccentric orbit
The Big Bang Theory
Summer Solstice
isotropic
22. Dark areas on the sun that are cooler than the surrounding photosphere
Liquid metallic hydrogen
Sunspots
Electromagnetic Radiation: Gamma Ray
Sa spiral galaxy
23. The law that syas light energy from a blackbody increases as (temperature^4)
Prominence
cosmic singularity
Eclipses of the Moons of Jupiter
Stephen-Boltzman Law
24. A telescope that uses lenses to focus light
Light Curve
Hyashi track
quasar
Refractor
25. A point in the sky where meteors appear to come from during a shower
Focal Plane
radiant
Chandrasekhar Limit
High Velocity Stars
26. Sc galaxies
chondrite
bulge
Flocculent spirals
Continuous Spectrum
27. A telescope that uses lenses to focus light
Cosmic Microwave Background
radiation pressure
Electromagnetic Radiation: Ultraviolet Light
Refractor
28. The rate of expansion of the universe.
radio lobe
Hubble constant
Nucleus
conjunction
29. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)
tectonics of Venus
synchronous rotation
Jovian Planets
Doppler Shift
30. An empirical scheme for predictin ghe orbital distances of planets
Titus-Bode Law
High Velocity Stars
planetary nebula
differential rotation
31. Earth
meteoriod
Doppler Shift
Apollo asteroids
Most dense
32. The process of acquiring material
Photosphere
accretion
Dwarf planets
slowest rotation
33. The Greek philosopher responsible for making the stellar magnitude scale.
Hipparchus
Doppler Shift
supernova
Void
34. Where is the center of the expansion
density parameter
Inverse Square Law
Occam's razor
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.
35. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)
Primary Mirror
SETI
Drake equation
Geocentric
36. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation
Population 1 vs Population 2 stars
Ole Roemer
AGN
shape and color of SPIRAL galaxies
37. 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
Prominence
disk
Meridian
Umbra
38. Half of the longest diameter across an ellipse
semimajor axis
nucleus
Positive - Converge - Greater than 1
Differential Rotation
39. The rock that makes up the lunar highlands
planetary nebula
anorthosite
conjunction
Grand design spirals
40. The elementary building blocks from which protons and neutrons are formed.
Positive - Converge - Greater than 1
thinnest atmosphere
quarks
Granules
41. 10^2 nm 10^7 nm
Largest diameter
matter dominated universe
Electromagnetic Radiation: Gamma Ray
meteor shower
42. The projection of the Earth's equator onto the celestial sphere.
greatest elongation
Celestial Equator
force
Annular Eclipse
43. IO
MOONS: most geologically active
Ole Roemer
Occam's razor
deferent
44. A star that blows itself apart
Active Optics
Shepherd satellite
Supernova (You can be my supernova girl)
Celestial Equator
45. Elliptical orbits that come inside orbit of the Earth.
Synodic Day
Apollo asteroids
Seyfert galaxy
CCD
46. A small round distribution of gas surrounding a dying star
Europa (Jupiters moon)
Planetary Nebula
Summer Solstice
Enke gap
47. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas
dark matter
accretion
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.
Dark Nebula
48. The 'edge' of the universe. Light beyond this has not reached us yet.
contrast northern lowlands and the southern highlands of mars...
partile horizon
Chandrasekhar Limit
rotation curve = dark matter?
49. Dark areas on the sun that are cooler than the surrounding photosphere
plate tectonics
contrast northern lowlands and the southern highlands of mars...
Sunspots
Kuiper belt
50. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)
Shepherd satellite
matter dominated universe
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
Horizontal Branch Star