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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. Very center of galaxy. suggestion of a black hole
Celestial Equator
nucleus
Coldest surface
Penumbra
2. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.
Rich Cluster
The Big Bang Theory
nova
Big Bang
3. A spectrum of light with energy at only a few wavelengths.
Emission Spectrum
partile horizon
Chromosphere
Gamma-ray Burst
4. The distance light travels in one year (=9.46x10^12km).
Penumbra
Disk
Light-Year
Disk
5. The material from which the solar system formed
Europa (Jupiters moon)
Convection
Extrasolar Planet
solar nebula
6. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder
Heliocentric
shape and color of ELLIPTICAL galaxies
Active Optics
asteroid
7. An evolved star - past the helium flash that is burning helium to carbon in it's cores
Thermonuclear Fusion
Spectroscopic parallax
Electromagnetic Radiation
Horizontal Branch Star
8. A planet that is farther from the sun than the Earth is
open star clusters
Superior planets
Gamma-ray Burst
Shepherd satellite
9. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use
Flat - Flat
Hubble law
deferent
shape and color of SPIRAL galaxies
10. An important quality of telescopes that increases as the square of the primary mirror or objective lens
Light Gathering Power
Limb darkening
Electromagnetic Radiation: Radio
Supernova (You can be my supernova girl)
11. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)
Kirkwood gaps
rotation curve=winding dilemma?
SETI
Neutron Star
12. The apparent magnitude a star would have if it were at a distance of 10 parsecs.
Absolute Magnitude
Sb spiral galaxy
Ground State
gravity
13. Clouds of low density gas often found glowing faintly on either side of an AGN.
cosmic fireball
radio lobe
Sa spiral galaxy
Make up of the terrestrial planets
14. The crust of a meteorite caused by its entry into Earth's atmosphere
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
fusion crust
Main Sequence
mass
15. A repeated - periodic push or pull capable of summing into a larger push or pull
tectonics of Earth
resonance
Apparent Magnitude
Astronomical Unit
16. How did Earth come to have an oxygen rich atmosphere?
most moons
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.
Maria
Jovian Planets
17. Why does the earth have few craters while the moon has many?
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Chandrasekhar Limit
Quasar
roche limit
18. The mass of an object divided by its volume
Supercluster
Convection
density
mare basalt
19. 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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20. Any class of objects with a uniform luminosity used to determine distance.
Dark Nebula
Largest diameter
MOONS: larger than mercury
standard candle
21. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE
Absorption Spectrum
quarks
Ganymede (Jupiter)
Hubble law
22. The source of the force that is accelerating the expansion rate of the universe.
Big Crunch
Globular Cluster
Yes - frozen at the poles- remains protected from the suns rays
dark energy
23. The apparent magnitude a star would have if it were at a distance of 10 parsecs.
Roundest orbit
Absolute Magnitude
open star clusters
Oort cloud
24. The amount an image is enlarged by a telescope
Colestial Pole
Magnification
Sc spiral galaxy
Apparent Magnitude
25. The part of the Milky way that has on-going star formation
Red Giant Branch Star
Enke gap
Disk
Neutron Star
26. The process that powers the sun and hydrogen bombs
Oort cloud
Population 1 vs Population 2 stars
Thermonuclear Fusion
HII Region
27. Orbit in Jupiters orbit
Trojan asteroids
Poor Cluster
E=mc2
partile horizon
28. The oldest part of the Milky Way
Halo
radiation dominated universe
Dwarf planets
accretion
29. The rock that makes up the lunar highlands
fewest moons
Galilean satellite
White Dwarf
anorthosite
30. The north-south line passing directly overhead through the zenith.
Plank's Law
Big Bang
Meridian
smallest diameter
31. A galaxy emitting large amounts of energy at long wavelengths.
Photometry
plate tectonics
radio galaxy
Jupiters red spot
32. A word used in astronomy to describe all elements besides hydrogen and helium
Positive - Converge - Greater than 1
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Hipparchus
Metals
33. 100 nm 10 nm
Kuiper belt
Electromagnetic Radiation: Ultraviolet Light
mass
Seyfert galaxy
34. 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
Kuiper belt
Spectroscopic parallax
Cosmological Principle
asteroid
35. A particle of light
Absorption Spectrum
semimajor axis
Spectral Lines
Photon
36. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
accretion disk
Sc spiral galaxy
Bok Globule
Magnification
37. A particle of light
Light-Year
Halo
Photon
Kirkwood gaps
38. What causes the zones and belts on jupiter and saturn?
Thickest atmosphere
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
How is winding dilemma solved?
radiant
39. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie
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40. Matter so dense that even light cannot escape its gravity
Black Hole
Maria
Secondary Mirror
Ecliptic
41. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.
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42. A two-filter measure of the color - and hence temperature - of a star.
Photometry
Color Index
Red Giant
CCD
43. A long-lived high-pressure bulge in Jupiter's southern hemisphere
great red spot
evidence of water on mars
White Dwarf
CMB
44. The law stating that hotter blackbodies look bluer than cooler blackbodies.
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45. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)
aurora
High Velocity Stars
radiation dominated universe
Focal Plane
46. The distance between a lens and its focal plane
critical density
Focal Length
mare basalt
aphelion
47. The lowest energy of an atom.
quasar
Ground State
density waves
inferior planets
48. The location of a supermassive black hole
Nucleus
The Big Bang Theory
Flat - Remain Parallel - Exactly 1
Milky way Galaxy
49. A prominence seen against the disk of the sun
Grand design spirals
Filament
Corona
Oort Cloud
50. 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.
Largest diameter
Europa (Jupiters moon)
Particle Horizon
Continuous Spectrum