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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. When the Sun moves from south to north across the celestial equator (about March 21)
Superior planets
Gamma ray bursts
quasar
Vernal Equinox
2. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this
Milky way Galaxy
cosmology
Kuiper belt
H-are Diagram
3. The crust of a meteorite caused by its entry into Earth's atmosphere
300000 KM/sec
widmanstatten pattern
fusion crust
MOONS: most geologically active
4. Jupiter
Doppler Shift
Colestial Pole
MOONS: most geologically active
Largest diameter
5. A two-filter measure of the color - and hence temperature - of a star.
We don't know. It might be but does not have to be.
Plank's Law
Color Index
Cosmological Principle
6. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE
Make up of the terrestrial planets
OB Associations
Europa (Jupiters moon)
A family of radiant energy- includes light
7. All wavelengths of light emitted by a blackbody.
Light Pollution
deferent
Gamma-ray Burst
Blackbody Curve
8. The surface of the sun
Zenith
3 reasons we orbit satellites to observe universe
Photosphere
isotropic
9. Why do Galaxies move very rapidly in the interiors of the dense clusters?
Maria
meteor shower
Titus-Bode Law
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
10. Jupiter
most moons
Disk
Dwarf planets
contrast northern lowlands and the southern highlands of mars...
11. 1μm 100 nm
Trojan asteroids
Electromagnetic Radiation: Visible Light
tectonics of Mars
Electromagnetic Radiation
12. The law stating that hotter blackbodies look bluer than cooler blackbodies.
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13. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)
Kuiper belt
protostar
cosmological principle
Spectroscopy
14. A distance measure determined by the shifting of a star against the background sky every 6 months.
Winter Solstice
gravity
Parsec
Largest diameter
15. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas
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
OB Associations
HII Region
Wein's Law
16. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction
3 reasons we orbit satellites to observe universe
interstellar dust
conjunction
Cepheid variables
17. A point in the sky where meteors appear to come from during a shower
Roundest orbit
scarp
Colestial Pole
radiant
18. The oldest terrain on the moon
highlands
Drake equation
Ganymede (Jupiter)
Cepheid variables
19. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids
Kirkwood gaps
Penumbra
thinnest atmosphere
Penumbra
20. The number of protons in an atom.
High Velocity Stars
Planetary Nebula
Atomic Number
aphelion
21. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.
Negative - Diverge - Less than 1
Total Eclipse
supermassive black hole
MOONS: larger than mercury
22. The location around an atom where an electron resides.
The Big Bang Theory resolves Olber's Paradox
Energy Level
Meridian
belt
23. The law that syas light energy from a blackbody increases as (temperature^4)
Globular Cluster
accretion disk
Stephen-Boltzman Law
great red spot
24. A planet that is farther from the sun than the Earth is
Blackbody
Superior planets
Sc spiral galaxy
Precession
25. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas
Sa spiral galaxy
Dark Nebula
Brown dwarf
scarp
26. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:
Drake equation
quarks
accretion
Red Giant
27. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.
Population 1 vs Population 2 stars
gravity
retrograde motion
radio galaxy
28. IO
quasar
MOONS: larger than mercury
MOONS: most geologically active
Quasar
29. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes
CMB
force
Quasar
Density Wave
30. The gap etween saturn's A and B rings
Largest diameter
isotropic
Photometry
Cassini division
31. The telescope configuration that has the focus placed at the back of the primary mirror
Cassegrain Focus
Jupiters red spot
rotation curve = dark matter?
fewest moons
32. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.
Seeing
Big Bang
Eclipses of the Moons of Jupiter
Gamma ray bursts
33. VENUS
Cassini division
Energy Level
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
mare basalt
34. The science of measuring light energy by wavelength.
Turn off Point
Spectroscopy
least dense
Ole Roemer
35. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)
Sa spiral galaxy
matter dominated universe
radiation dominated universe
Most dense
36. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.
CMB
tectonics of Earth
Umbra
regolith
37. A force exerted by reflecting sunlight
radiation pressure
supernova
Electromagnetic Radiation: Infrared
radiation dominated universe
38. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.
Light Curve
quasar
The Big Bang Theory
Emission Spectrum
39. The rotation period of the Earth measured relative to the stars.
Sidereal Day
Ammonia - methane - and water
radiation pressure
radiation dominated universe
40. The study of the universe as a whole.
Inverse Square Law
Synchrotron Rotation
Spectroscopic parallax
cosmology
41. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant
asteroid
Thermal Equilibrium
fewest moons
Asymptotic giant Branch Star
42. When particles are compressed to an unnatural state where their pressure is not related to their temperature
Cosmic Microwave Background (CMB)
Halo
Degeneracy
superclusters
43. A long-lived high-pressure bulge in Jupiter's southern hemisphere
great red spot
Differential Rotation
Terrestrial Planets
Nebula
44. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant
planetary nebula
density waves
Thermal Equilibrium
Ole Roemer
45. The movement of the Earth's crustal plates riding on top of the mantle.
plate tectonics
Magnification
most moons
Kuiper belt
46. When one side of a body always faces the planet it revolves around
disk
Winter Solstice
Lagrangian Razor
synchronous rotation
47. When massive objects bend space and time enough to create multiple images of an object located behind them
Main Sequence
Gravitational Lens
cosmic singularity
Emission Spectrum
48. Mercury and venus
Electron
fewest moons
Energy Level
Cassini division
49. Long - meandering cliff formed when a planet surface cools and shrinks
rotation curve = dark matter?
matter dominated universe
Make up of the terrestrial planets
scarp
50. The fusion process that turns three helium nuclei into a carbon nucleus
Triple Alpha rocess
The Big Bang Theory
dark energy
White Dwarf