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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 particle of light
disk
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.
Photon
shape and color of ELLIPTICAL galaxies
2. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.
interstellar dust
protostar
Turn off Point
Plank's Law
3. Jupiter
Red Giant
Population 1 vs Population 2 stars
Zenith
Largest diameter
4. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)
synchronous rotation
Void
Winter Solstice
rotation curve=winding dilemma?
5. Sc galaxies
Flocculent spirals
neutrino
Bulge
Sa spiral galaxy
6. The north-south line passing directly overhead through the zenith.
Largest diameter
E=mc2
MOONS: largest size
Meridian
7. A continuous spectrum of light missing energy at a few wave lengths.
Chromosphere
Absorption Spectrum
Blackbody
3 reasons we orbit satellites to observe universe
8. VENUS
protostar
Kuiper belt
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
Electron
9. A bright area of higher temperature that often proceeds the formation of sunspots.
Hydrostatic Equilibrium
Plague
Atomic Number
matter dominated universe
10. Saturn
least dense
chondrite
Blackbody
H-are Diagram
11. Matter that reveals itself only through its gravitational attraction
Hipparchus
Degeneracy
Dark Matter
partile horizon
12. The rotation period of the Earth measured relative to the Sun.
Light Pollution
Synodic Day
Electromagnetic Radiation: Microwave
synchronous rotation
13. The rotation of a star or planet at different speeds at its equator and poles
Cassini division
differential rotation
Supernova (You can be my supernova girl)
Disk
14. The mass of an object divided by its volume
Molecular Clouds
density
Supercluster
Drake equation
15. The movement of the Earth's crustal plates riding on top of the mantle.
resonance
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.
Light Gathering Power
plate tectonics
16. A high-pressure bulge in Neptune's southern hemisphere
great dark spots
Ganymede (Jupiter)
Umbra
Particle Horizon
17. A push or a pull
Electromagnetic Radiation
force
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.
Halo
18. The apparent backward motion of a planet against the background of stars.
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.
acceleration
retrograde motion
Pixel
19. The area behind a lens where images are resolved
The Local Group
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
Kirchhoff's Law
Focal Plane
20. 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
partile horizon
disk
Dark Nebula
reflection star clusters
21. 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
mass
bulge
Refractor
H2 Regions
22. A galaxy emitting large amounts of energy at long wavelengths.
Light Pollution
radio galaxy
Most dense
Void
23. A change in the appearance of the sun at the edge of the solar disk
Limb darkening
AGN
Hydrostatic Equilibrium
Ionization
24. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
general star population
Positive - Converge - Greater than 1
Energy Level
homogeneous
25. That which is responsible for Jupiter's magnetic field
Liquid metallic hydrogen
interstellar dust
dark matter
Apollo asteroids
26. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.
Halo
inferior planets
Kirchhoff's Law
MOONS: larger than mercury
27. 1 mm 1μm
MOONS: most geologically active
Electromagnetic Radiation: Infrared
Void
Convection
28. When the Sun is farthest south of the celestial equator (About December 22)
Winter Solstice
Hubble law
Spectroscopic parallax
Flat - Flat
29. 10 nm 10^2 nm
Electromagnetic Radiation: X-Ray
dark energy
resonance
density waves
30. Very center of galaxy. suggestion of a black hole
Triple Alpha rocess
Roundest orbit
nucleus
Photosphere
31. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.
synchronous rotation
synchrotron radiation
Atomic Number
condensation temperature
32. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR
reflection star clusters
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.
isotropic
supernova
33. Either Io -Europa - Ganymede - or Callisto
Bok Globule
Galilean satellite
A family of radiant energy- includes light
most eccentric orbit
34. Ganymede and Titan
Sa spiral galaxy
MOONS: larger than mercury
aurora
planetesimal
35. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.
Grand design spirals
Hyashi track
White Dwarf
Kirchhoff's Law
36. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.
density waves
Jovian Planets
Globular Cluster
Main Sequence Stars
37. The 'edge' of the universe. Light beyond this has not reached us yet.
density
partile horizon
Radio Galaxy
Parsec
38. A spectrum of light with energy at only a few wavelengths.
Rich Cluster
Emission Spectrum
The Big Bang Theory resolves Olber's Paradox
Absolute Magnitude
39. A prominence seen against the disk of the sun
gravity
era of recombination
MOONS: largest size
Filament
40. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder
Cepheid Variable
shape and color of ELLIPTICAL galaxies
Astronomical Unit
tectonics of Earth
41. Heavier elements such as iron - silicon - magnesium - sulfer - nickel
chemical differentiation
Make up of the terrestrial planets
Rich Cluster
Plank's Law
42. An energetic event taking place in the early universe
Gamma-ray Burst
Electromagnetic Radiation: Infrared
tectonics of Earth
highlands
43. 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)
Doppler Shift
condensation temperature
Jupiters red spot
density waves
44. Form honeycomb like patterns surrounding empty or nearly empty voids.
interstellar dust
Grand design spirals
superclusters
Spectroscopy
45. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.
Inverse Square Law
evidence of water on mars
molecular clouds
Drake equation
46. 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
hottest surface
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
Particle Horizon
47. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging
Callisto (Jupiter)
Summer Solstice
CCD
Radiative Diffusion
48. A planet that is farther from the sun than the Earth is
Superior planets
greatest elongation
Hyashi track
Disk
49. Very center of galaxy. suggestion of a black hole
Sidereal Day
nucleus
Inverse Square Law
3 reasons we orbit satellites to observe universe
50. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object
quasar
mass
Supernova (You can be my supernova girl)
greehouse effects