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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. Venus
Supercluster
asteroid
Thickest atmosphere
hottest surface
2. What are the three possible geometries of the universe?
greehouse effects
Blackbody Curve
Open - flat - and closed.
disk
3. Possible Fates of the Universe
Hubble law
Astronomical Unit
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
chemical differentiation
4. Ganymede and Titan
Electromagnetic Radiation: Visible Light
Spectroscopic parallax
quasar
MOONS: larger than mercury
5. A term referring to Jupiter-like planets
Thickest atmosphere
jovian
Most dense
Interstellar Extinction
6. Centered on the sun.
Colestial Pole
Hyashi track
Heliocentric
Corona
7. Venus
retrograde motion
Dwarf planets
Degeneracy
hottest surface
8. The light produced when particles from the sun collide with atmospheric molecules
The Big Bang Theory
Cepheid variables
aurora
mapping the structure of Milky Way disk
9. A subatomic particle with a negative charge. It creates light.
Nebula
Cassegrain Focus
Electron
Oort cloud
10. The mass of an object divided by its volume
density
Neutron Star
Summer Solstice
Sc spiral galaxy
11. The process similar to conduction by which energy moves from the solar core to the convective layer
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.
Poor Cluster
Radiative Diffusion
roche limit
12. The point in its orbit where a planet is farthest from the sun
Synodic Day
aphelion
least dense
Astronomical Unit
13. When massive objects bend space and time enough to create multiple images of an object located behind them
thinnest atmosphere
H2 Regions
gravity
Gravitational Lens
14. Long - meandering cliff formed when a planet surface cools and shrinks
scarp
Convection
Winter Solstice
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.
15. The distance light travels in one year (=9.46x10^12km).
OB Associations
Light-Year
CNO Cycle
Spectroscopic Parallax
16. When the Sun is farthest south of the celestial equator (About December 22)
Winter Solstice
Electromagnetic Radiation
Big Crunch
most eccentric orbit
17. Jupiter
Gravitational Lens
Largest diameter
Hubble constant
CMB
18. An energetic event taking place in the early universe
nova
Gamma-ray Burst
Dark Matter
widmanstatten pattern
19. The oldest terrain on the moon
Objective Lens
A family of radiant energy- includes light
standard candle
highlands
20. Either Io -Europa - Ganymede - or Callisto
The Big Bang Theory
Galilean satellite
Europa (Jupiters moon)
nucleus
21. The material from which the solar system formed
Ole Roemer
roche limit
solar nebula
Total Eclipse
22. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.
inferior planets
Electromagnetic Radiation: Infrared
Active Optics
Negative - Diverge - Less than 1
23. The lowest energy of an atom.
Synchrotron Rotation
slowest rotation
Flare
Ground State
24. A fusion process in which protons build together to form helium
Proton-proton chain
Main Sequence
Particle Horizon
critical density
25. A star that erratically and explosively brightens and dims
self-propagating star formation
Nova
mare basalt
chondrite
26. The apparent magnitude a star would have if it were at a distance of 10 parsecs.
MOONS: most geologically active
MOONS: largest size
isotropic
Absolute Magnitude
27. Sc galaxies
meteor shower
Flocculent spirals
self-propagating star formation
Red Giant Branch Star
28. 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
nova
Nucleus
open star clusters
Kuiper belt
29. Matter that reveals itself only through its gravitational attraction
Dark Matter
Nova
Sunspots
most eccentric orbit
30. The average distance between the Earth and the Sun (=1.5 x10^8km)
Prominence
Electromagnetic Radiation
Astronomical Unit
Jovian Planets
31. VENUS
era of recombination
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.
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
CNO Cycle
32. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.
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33. The elementary building blocks from which protons and neutrons are formed.
Primary Mirror
planetesimal
quarks
mass
34. Infinitely long -> 10 cm
nucleus
Kuiper belt
Electromagnetic Radiation: Radio
CNO Cycle
35. The rock that makes up the lunar maria
Astronomical Unit
mare basalt
Quasar
Hubble constant
36. When one side of a body always faces the planet it revolves around
synchronous rotation
Flat - Flat
jovian
Stephen-Boltzman Law
37. A star that is in the process of forming. It glows from gravitational contraction
Atomic Number
Color Index
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.
protostar
38. Where is the center of the expansion
Inverse Square Law
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.
Plague
bulge
39. What is the universe expanding into?
Neutron Star
Planck time
Negative - Diverge - Less than 1
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.
40. 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
Europa (Jupiters moon)
Kuiper belt
Lagrangian Razor
synchrotron radiation
41. All wavelengths of light emitted by a blackbody.
Kirkwood gaps
Blackbody Curve
Europa (Jupiters moon)
Asymptotic giant Branch Star
42. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.
differential rotation
weight
Negative - Diverge - Less than 1
partile horizon
43. An entity that is likely in the nucleus of most - if not all - galaxies.
Cosmological Principle
supermassive black hole
Main Sequence Stars
MOONS: most geologically active
44. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes
cosmological principle
Kuiper belt
E=mc2
radio galaxy
45. A rock or iron specimen that has fallen from space
hottest surface
meteorite
Most dense
solar nebula
46. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.
Gamma ray bursts
nucleus
mapping the structure of Milky Way disk
thinnest atmosphere
47. An element of a highly efficient - two-dimensional electronic light detector
most moons
Pixel
slowest rotation
difference between maria and highlands of the moon.
48. Comglomerates of ice and rock that orbit the sun in highly elliptical paths
quasar
supernova
Wein's Law
comet
49. Mercury
evidence of water on mars
Trojan asteroids
smallest diameter
planetesimal
50. A term referring to the orbital character of stars near the Sun
Differential Rotation
Main Sequence
zone
Oort Cloud