SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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 normal eastward movement of a planet against the background of hte distant stars.
Convection
direct motion
Chandrasekhar Limit
The Big Bang Theory
2. When the Moon entirely blocks the Sun.
MOONS: thickest atmosphere
Total Eclipse
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.
Spectroscopy
3. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)
Supercluster
matter dominated universe
Particle Horizon
Nucleus
4. A star that is in the process of forming. It glows from gravitational contraction
protostar
great dark spots
Geocentric
Perihelion
5. 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.
Oort Cloud
Light Pollution
Instability strip
6. What are the three possible geometries of the universe?
Cosmic Microwave Background (CMB)
Coronal Loop
tectonics of Mars
Open - flat - and closed.
7. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.
deferent
greehouse effects
homogeneous
If it is in a denser medium - such as glass - it will move slower
8. 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.
Dark Nebula
Density Wave
Particle Horizon
9. When the Sun is farthest north of the celestial equator (about June 22)
Magnification
Meridian
greehouse effects
Summer Solstice
10. 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.
CMB
Open Cluster
mare basalt
Oort Cloud
11. Why do Galaxies move very rapidly in the interiors of the dense clusters?
Instability strip
Colestial Pole
chondrite
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
12. Half of the longest diameter across an ellipse
Sa spiral galaxy
Eyepiece Lens
semimajor axis
isotropic
13. A high-pressure bulge in Neptune's southern hemisphere
Colestial Pole
Globular Cluster
great dark spots
Focal Length
14. Comglomerates of ice and rock that orbit the sun in highly elliptical paths
comet
neutrino
Wein's Law
3 reasons we orbit satellites to observe universe
15. The mirror that gathers the light in a reflector
Primary Mirror
Chromosphere
Big Crunch
reflection star clusters
16. A word meaning 'the same in all directions.'
radiation pressure
isotropic
Halo
cosmological principle
17. A huge sphere of tenuous gas surrounding the nucleus of a comet
nucleus
HII Region
chondrite
coma
18. The mass of an object divided by its volume
critical density
anorthosite
density
Dark matter candidates
19. Infinitely long -> 10 cm
Electromagnetic Radiation: Radio
radiant
Molecular Clouds
Halo
20. The crust of a meteorite caused by its entry into Earth's atmosphere
fusion crust
fewest moons
MOONS: roundest shape
mare basalt
21. A small chunk of rock in space
Filament
Chandrasekhar Limit
meteoriod
resonance
22. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.
force
Parallax
condensation temperature
gravity
23. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.
Photon
Extrasolar Planet
Celestial Equator
shape and color of SPIRAL galaxies
24. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu
Electromagnetic Radiation: Gamma Ray
Photometry
Gamma-ray Burst
Cepheid variables
25. A planet orbiting about a distant star
Radio Galaxy
Extrasolar Planet
Ole Roemer
Resolving Power
26. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.
mass
Vernal Equinox
Population 1 vs Population 2 stars
Radiative Diffusion
27. Large nebula consisting of very cold gas and dust
Instability strip
reflection star clusters
The Big Bang Theory resolves Olber's Paradox
Molecular Clouds
28. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.
Parallax
quasar
Ganymede (Jupiter)
Dark matter candidates
29. The oldest part of the Milky Way
Synodic Day
Granules
Halo
asteroid
30. The layer of the sun just above the photosphere
Umbra
Chromosphere
partile horizon
Brown dwarf
31. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu
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.
Sc spiral galaxy
Cepheid variables
Asymptotic giant Branch Star
32. When a planet lines up with the sun inthe sky
dark matter
Roundest orbit
Make up of the terrestrial planets
conjunction
33. The process similar to conduction by which energy moves from the solar core to the convective layer
Radiative Diffusion
shape and color of ELLIPTICAL galaxies
Parsec
Continuous Spectrum
34. Venus
hottest surface
cosmological red shift
Bok Globule
Active Optics
35. A logarithmically scaled value for the measured brightness of a star.
Apparent Magnitude
Make up of the terrestrial planets
chondrite
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
36. A continuous spectrum of light missing energy at a few wave lengths.
OB Associations
Absorption Spectrum
Sa spiral galaxy
Pixel
37. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.
acceleration
cosmic singularity
Sidereal Day
molecular clouds
38. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE
Absorption Spectrum
Sa spiral galaxy
Io (jupiters moon)
cosmic fireball
39. In Ptolemy's geocentric solar system - the small circle on which a planet moved.
Kuiper belt
Reflector
Seyfert galaxy
epicycle
40. Saturn
inferior planets
Nebula
greehouse effects
least dense
41. An empirical scheme for predictin ghe orbital distances of planets
Rich vs poor clusters
Titus-Bode Law
planetesimal
condensation temperature
42. The telescope configuration that has the focus placed at the back of the primary mirror
Eyepiece Lens
Galilean satellite
E=mc2
Cassegrain Focus
43. An evolved star - past the helium flash that is burning helium to carbon in it's cores
Horizontal Branch Star
meteor shower
fusion crust
Cosmic Microwave Background (CMB)
44. 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
Density Wave
We don't know. It might be but does not have to be.
Shepherd satellite
45. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.
White Dwarf
Hubble law
Grand design spirals
open star clusters
46. The rotation period of the Earth measured relative to the Sun.
Oort Cloud
Synodic Day
Halo
Limb darkening
47. The movement of the Earth's crustal plates riding on top of the mantle.
plate tectonics
open star clusters
opposition
Electromagnetic Radiation: Microwave
48. Neptune or uranus
Coldest surface
HII Region
High Velocity Stars
Meridian
49. The entity responsible for spiral arms in grand-design spiral galaxies
Dark matter candidates
Big Bang
Absorption Spectrum
Density Wave
50. Material that shoots rapidly out into space. Flares cause Auroras
Cassini division
quarks
Flare
Continuous Spectrum