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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. 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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2. That which is responsible for Jupiter's magnetic field
Black Hole
Liquid metallic hydrogen
MOONS: thickest atmosphere
The Big Bang Theory
3. 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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4. Then the Sun moves from north to south across the celestial equator (about September 23)
Heliocentric
Autumnal Equinox
Continuous Spectrum
Hipparchus
5. VENUS
Coldest surface
aurora
Electromagnetic Radiation
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
6. Very center of galaxy. suggestion of a black hole
least dense
nucleus
Umbra
Spectroscopic Parallax
7. Matter so dense that even light cannot escape its gravity
Magnification
Dwarf planets
Black Hole
Energy Level
8. An element of a highly efficient - two-dimensional electronic light detector
Coldest surface
Pixel
Self-Propogating Star Formation
SETI
9. A spread of light with an uninterrupted wavelength distribution of energy.
molecular clouds
Continuous Spectrum
Corona
Coronal Loop
10. A streak of light in the atmosphere
meteor
Light Curve
MOONS: thickest atmosphere
Turn off Point
11. Orbit in Jupiters orbit
MOONS: largest size
Trojan asteroids
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
Resolving Power
12. The crust of a meteorite caused by its entry into Earth's atmosphere
Supercluster
radiant
fusion crust
Sb spiral galaxy
13. Dark - reddish - low-pressure bands in Jupiter's atmosphere
Sb spiral galaxy
belt
Planetary Nebula
Annular Eclipse
14. 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
High Velocity Stars
Bok Globule
Trojan asteroids
15. Elliptical orbits that come inside orbit of the Earth.
tectonics of Earth
Parallax
Hipparchus
Apollo asteroids
16. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto
Jupiters red spot
Kuiper belt
How is winding dilemma solved?
Plank's Law
17. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies
H2 Regions
Maria
Rich vs poor clusters
Big Bang
18. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.
era of recombination
Interstellar Extinction
isotropic
Negative - Diverge - Less than 1
19. A small chunk of rock in space
Flare
Light: travels like a wave - detected like a particle
force
meteoriod
20. The movement of the Earth's crustal plates riding on top of the mantle.
semimajor axis
radio galaxy
Reflector
plate tectonics
21. Material that shoots rapidly out into space. Flares cause Auroras
Flare
Poor Cluster
Hubble law
Yes - frozen at the poles- remains protected from the suns rays
22. A galaxy emitting large amounts of energy at long wavelengths.
radio galaxy
chondrite
Quasar
Nebula
23. An element of a highly efficient - two-dimensional electronic light detector
Pixel
AGN
Hubble law
neutrino
24. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE
weight
Callisto (Jupiter)
force
mass
25. 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)
comet
Doppler Shift
Oort Cloud
Superior planets
26. 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
disk
Hipparchus
Jovian Planets
self-propagating star formation
27. A point in the sky where meteors appear to come from during a shower
density parameter
Gravitational Lens
era of recombination
radiant
28. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)
Chandrasekhar Limit
Differential Rotation
accretion
planetary nebula
29. Venus
H2 Regions
radiation dominated universe
Terrestrial Planets
hottest surface
30. A logarithmically scaled value for the measured brightness of a star.
Cepheid variables
Apparent Magnitude
If it is in a denser medium - such as glass - it will move slower
cosmic fireball
31. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas
Absolute Magnitude
Oort cloud
HII Region
Cassini division
32. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation
critical density
cosmological principle
general star population
AGN
33. Possible Fates of the Universe
Metals
Most dense
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
Electromagnetic Radiation: Microwave
34. A huge sphere of tenuous gas surrounding the nucleus of a comet
coma
Spectroscopy
OB Associations
Electromagnetic Radiation
35. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.
shape and color of SPIRAL galaxies
highlands
Oort Cloud
rotation curve = dark matter?
36. The study of the universe as a whole.
solar nebula
planetesimal
cosmology
standard candle
37. Jupiter
Electromagnetic Radiation: Gamma Ray
fastest rotation
Density Wave
Zenith
38. All wavelengths of light emitted by a blackbody.
Blackbody Curve
scarp
Ground State
Neutron Star
39. 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.
Titus-Bode Law
Turn off Point
Big Bang
Kirkwood gaps
40. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.
Plank's Law
Dark Matter
Light Pollution
Oort Cloud
41. 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.
contrast northern lowlands and the southern highlands of mars...
planetesimal
Geocentric
Ground State
42. What are the three possible geometries of the universe?
Jovian Planets
Open - flat - and closed.
Blackbody Curve
Photon
43. The study of the universe as a whole.
Electromagnetic Radiation: X-Ray
Light-Year
deferent
cosmology
44. Elliptical orbits that come inside orbit of the Earth.
Apollo asteroids
epicycle
Positive - Converge - Greater than 1
Gravitational Lens
45. A distance measure determined by the shifting of a star against the background sky every 6 months.
density waves
Parsec
radio lobe
tectonics of Venus
46. A force exerted by reflecting sunlight
radio lobe
Big Crunch
radiation pressure
disk
47. An empirical scheme for predictin ghe orbital distances of planets
quasar
radiation pressure
Celestial Sphere
Titus-Bode Law
48. A plot of star absolute magnitude verses spectral type.
H-are Diagram
Stephen-Boltzman Law
zone
cosmic singularity
49. The wavelengths where a specific element can absorb or emit light.
Spectral Lines
Ganymede (Jupiter)
Spectroscopic parallax
Proton-proton chain
50. The mirror that determines the focus configuration of a reflector
H2 Regions
Shepherd satellite
coma
Secondary Mirror