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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 displacement of spectral lines to redder colors caused by the expansion of the universe.
molecular clouds
Cosmological Principle
cosmological red shift
Halo
2. An empirical scheme for predictin ghe orbital distances of planets
Total Eclipse
Callisto (Jupiter)
Titus-Bode Law
Light Gathering Power
3. Ganymede and Titan
MOONS: larger than mercury
Autumnal Equinox
neutrino
most moons
4. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc
critical density
Blackbody
great dark spots
Eyepiece Lens
5. The rotation period of the Earth measured relative to the stars.
Bok Globule
Synchrotron Rotation
Sidereal Day
Big Bang
6. The average distance between the Earth and the Sun (=1.5 x10^8km)
MOONS: roundest shape
Spectroscopic Parallax
disk
Astronomical Unit
7. Hot cells of gas that rise and fall in the hotosphere
Corona
Granules
Galilean satellite
Supernova (You can be my supernova girl)
8. The rotation period of the Earth measured relative to the Sun.
Ionization
Geocentric
Synodic Day
Galilean satellite
9. Venus
hottest surface
Sunspots
protostar
A family of radiant energy- includes light
10. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.
Negative - Diverge - Less than 1
Yes - frozen at the poles- remains protected from the suns rays
great dark spots
Observations of distant type Ia supernovae indicate that the expansion of the universe is speeding up with time - not slowing down! So there must be a force causing this.
11. Light scattered through the atmosphere that degrades astronomical images
Light Pollution
Black Hole
Red Giant
era of recombination
12. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.
synchronous rotation
Degeneracy
CMB
SETI
13. 1 mm 1μm
nova
Electromagnetic Radiation: Infrared
Photometry
Flare
14. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.
Particle Horizon
Convection
direct motion
tectonics of Venus
15. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder
Instability strip
Doppler Shift
Europa (Jupiters moon)
shape and color of ELLIPTICAL galaxies
16. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
Main Sequence Stars
Flat - Remain Parallel - Exactly 1
Jupiters red spot
Kuiper belt
17. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)
conjunction
Horizontal Branch Star
SETI
Open - flat - and closed.
18. Moon in less than the angular diameter of the Sun.
MOONS: largest size
Celestial Equator
Annular Eclipse
Hyashi track
19. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.
fewest moons
isotropic
Limb darkening
Cosmological Principle
20. The rock that makes up the lunar maria
mare basalt
Roundest orbit
Sb spiral galaxy
Colestial Pole
21. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.
The Big Bang Theory
density waves
supermassive black hole
Cepheid variables
22. A particle of light
great dark spots
jovian
Photon
Electromagnetic Radiation: Microwave
23. The 'edge' of the universe. Light beyond this has not reached us yet.
MOONS: largest size
most eccentric orbit
jovian
partile horizon
24. Poitns of gravitational stability in the orbit of a planet
White Dwarf
Big Crunch
Lagrangian Razor
critical density
25. The telescope configuration that has the focus placed at the back of the primary mirror
Cassegrain Focus
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Interstellar Extinction
meteor
26. The law that describes the blackbody curve - and let to quantum mechanics.
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27. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density
cosmic fireball
Magnification
Photosphere
density parameter
28. A collection of galaxies like the one the Milky Way belongs to
belt
We don't know. It might be but does not have to be.
Roundest orbit
Poor Cluster
29. The oldest part of the Milky Way
Limb darkening
open star clusters
Halo
Cepheid variables
30. Any change in the speed or direction of an object's motion
acceleration
Pixel
Globular Cluster
mare basalt
31. The organization of clusters of galaxies into sheets and strings
Inverse Square Law
era of recombination
Eclipses of the Moons of Jupiter
Supercluster
32. A term referring to Jupiter-like planets
jovian
OB Associations
Focal Length
Yes - frozen at the poles- remains protected from the suns rays
33. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core
Focal Length
Magnification
Asymptotic giant Branch Star
We don't know. It might be but does not have to be.
34. Dark areas on the sun that are cooler than the surrounding photosphere
Sunspots
Perihelion
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.
meteoriod
35. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.
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36. A fusion process in which protons build together to form helium
coma
Proton-proton chain
Doppler Shift
disk
37. 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.
dark energy
tectonics of Earth
scarp
mapping the structure of Milky Way disk
38. Is there water on the moon?
Pulsar
Supercluster
MOONS: thickest atmosphere
Yes - frozen at the poles- remains protected from the suns rays
39. A large and bright but cool star.
Red Giant
Stephen-Boltzman Law
meteor shower
Most dense
40. 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.
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.
Particle Horizon
difference between maria and highlands of the moon.
opposition
41. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.
Umbra
self-propagating star formation
MOONS: most geologically active
Dark matter candidates
42. Mercury
smallest diameter
Neutron Star
epicycle
rotation curve=winding dilemma?
43. A change in the appearance of the sun at the edge of the solar disk
Flat - Flat
Limb darkening
Make up of the jovian planets
Halo
44. What causes the zones and belts on jupiter and saturn?
Parsec
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
Zenith
The Big Bang Theory
45. The science of measuring the apparent magnitudes of stars by imaging them through different filters.
Oort cloud
Degeneracy
Photometry
jovian
46. When the Sun moves from south to north across the celestial equator (about March 21)
Io (jupiters moon)
Vernal Equinox
Seyfert galaxy
Main Sequence Stars
47. A small spherical dark nebula
We don't know. It might be but does not have to be.
Bok Globule
Molecular Clouds
meteoriod
48. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
dark energy
Continuous Spectrum
Positive - Converge - Greater than 1
Absorption Spectrum
49. A younger cluster of stars - found in the galaxy disk
accretion
density waves
Open Cluster
isotropic
50. The act of removing an electron from an atom.
Ganymede (Jupiter)
E=mc2
Synodic Day
Ionization