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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 measure of the ability of a telescope to see fine detail
Stephen-Boltzman Law
Resolving Power
accretion disk
Negative - Diverge - Less than 1
2. A location on an H-are Diagram where evolving stars pulsate
synchrotron radiation
Olber's paradox
Hydrostatic Equilibrium
Instability strip
3. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)
Light: travels like a wave - detected like a particle
shape and color of SPIRAL galaxies
blazar
jovian
4. 1μm 100 nm
scarp
Electromagnetic Radiation: Visible Light
Nova
shape and color of SPIRAL galaxies
5. 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
Corona
Hubble law
Total Eclipse
standard candle
6. Where is the center of the expansion
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.
radio galaxy
direct motion
Chandrasekhar Limit
7. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)
rotation curve=winding dilemma?
greatest elongation
Celestial Sphere
Trojan asteroids
8. The part of the Milky way that has on-going star formation
Electron
dark energy
Disk
Negative - Diverge - Less than 1
9. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.
Electron
belt
contrast northern lowlands and the southern highlands of mars...
Umbra
10. A galaxy emitting large amounts of energy at long wavelengths.
Ole Roemer
radio galaxy
least dense
Nucleus
11. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p
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12. Hydrogen and helium (mainly)
Summer Solstice
open star clusters
Make up of the jovian planets
inferior planets
13. A spinning neutron star
Pulsar
Light Pollution
H-are Diagram
Plank's Law
14. Very center of galaxy. suggestion of a black hole
planetary nebula
nucleus
force
rotation curve = dark matter?
15. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.
Lagrangian Razor
Colestial Pole
synchrotron radiation
Thermal Equilibrium
16. 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)
Roundest orbit
quasar
MOONS: roundest shape
Continuous Spectrum
17. A push or a pull
Flat - Remain Parallel - Exactly 1
tectonics of Venus
force
thinnest atmosphere
18. A particle of light.
Particle Horizon
How is winding dilemma solved?
Photon
Light Gathering Power
19. The law that syas light energy from a blackbody increases as (temperature^4)
MOONS: largest size
Spectroscopic Parallax
accretion
Stephen-Boltzman Law
20. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.
difference between maria and highlands of the moon.
Ammonia - methane - and water
Limb darkening
Enke gap
21. The apparent path of the Sun through the stars on the celestial sphere.
Coronal Loop
Absolute Magnitude
Ecliptic
nucleus
22. The place in the sky that the Earth's axis points toward (can be either north or south)
Liquid metallic hydrogen
Colestial Pole
Big Crunch
Dark Matter
23. A subatomic particle with a negative charge. It creates light.
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
Jupiters red spot
Electron
Most dense
24. Matter so dense that even light cannot escape its gravity
Poor Cluster
Synchrotron Rotation
Black Hole
Coronal Loop
25. Jupiter
Largest diameter
Electromagnetic Radiation: Radio
Differential Rotation
The Local Group
26. Mercury and venus
radiation dominated universe
fewest moons
Astronomical Unit
planetary nebula
27. When massive objects bend space and time enough to create multiple images of an object located behind them
Limb darkening
Gravitational Lens
Synchrotron Rotation
Magnification
28. A massive variable star used to find distances to the galaxies or clusters that contain them.
cosmic fireball
chondrite
Black Hole
Cepheid Variable
29. The light produced when particles from the sun collide with atmospheric molecules
3 reasons we orbit satellites to observe universe
aurora
retrograde motion
Electromagnetic Radiation: Microwave
30. Europa
Perihelion
Europa (Jupiters moon)
Quasar
MOONS: roundest shape
31. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.
self-propagating star formation
Photon
deferent
aphelion
32. A spectrum of light with energy at only a few wavelengths.
Emission Spectrum
Poor Cluster
Jupiters red spot
Colestial Pole
33. The lowest energy of an atom.
Jupiters red spot
molecular clouds
Ground State
Main Sequence Stars
34. A particle of light
Seeing
neutrino
Electromagnetic Radiation: Radio
Photon
35. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.
Focal Length
Black Hole
belt
Neutron Star
36. The projection of the Earth's equator onto the celestial sphere.
Cassini division
Titus-Bode Law
highlands
Celestial Equator
37. When material is heated and moves taking the heat energy with it
radiation pressure
acceleration
H2 Regions
Convection
38. Venus
Parallax
opposition
Roundest orbit
accretion disk
39. How did Earth come to have an oxygen rich atmosphere?
Blackbody
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.
Density Wave
hottest surface
40. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.
Main Sequence
Electromagnetic Radiation: Microwave
reflection star clusters
Chandrasekhar Limit
41. 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
jovian
Hubble law
Brown dwarf
Parallax
42. Electromagnetic Radiation
cosmological red shift
A family of radiant energy- includes light
Spectroscopic Parallax
Halo
43. 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:
Focal Length
Drake equation
cosmology
If it is in a denser medium - such as glass - it will move slower
44. Neptune or uranus
widmanstatten pattern
Light Pollution
Coldest surface
Nucleus
45. 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
Perihelion
Kuiper belt
quarks
Neutron Star
46. Large nebula consisting of very cold gas and dust
High Velocity Stars
Molecular Clouds
synchrotron radiation
High Velocity Stars
47. The mass of an object divided by its volume
Meridian
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 matter candidates
density
48. A star fusing hydrogen to helium in it's core
Cepheid variables
synchronous rotation
Main Sequence Stars
Spectroscopic Parallax
49. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE
Electromagnetic Radiation
Europa (Jupiters moon)
Dark Nebula
Radiative Diffusion
50. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation
AGN
Steady State Theory (Leads to Olber's Paradox)
supermassive black hole
partile horizon