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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 logarithmically scaled value for the measured brightness of a star.
Enke gap
Bulge
least dense
Apparent Magnitude
2. Clouds of low density gas often found glowing faintly on either side of an AGN.
great red spot
mass
radio lobe
Most dense
3. The 'edge' of the universe. Light beyond this has not reached us yet.
Ecliptic
difference between maria and highlands of the moon.
partile horizon
epicycle
4. An object that may remain after a star explodes
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
Neutron Star
chondrite
Gravitational Lens
5. 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.
Wein's Law
Ganymede (Jupiter)
Parallax
Astronomical Unit
6. The location around an atom where an electron resides.
cosmological red shift
Energy Level
Active Optics
general star population
7. Any class of objects with a uniform luminosity used to determine distance.
solar nebula
standard candle
MOONS: largest size
Photosphere
8. The gap etween saturn's A and B rings
resonance
Cassini division
Coldest surface
Focal Plane
9. Jupiter
Synchrotron Rotation
most moons
Atomic Number
Convection
10. Large nebula consisting of very cold gas and dust
greehouse effects
Proton-proton chain
Molecular Clouds
Parsec
11. An energetic event taking place in the early universe
Population 1 vs Population 2 stars
Kuiper belt
partile horizon
Gamma-ray Burst
12. A planet that is farther from the sun than the Earth is
Superior planets
Occam's razor
Triple Alpha rocess
Electromagnetic Radiation: Ultraviolet Light
13. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth
self-propagating star formation
Sa spiral galaxy
Electromagnetic Radiation: Microwave
Autumnal Equinox
14. The distance light travels in one year (=9.46x10^12km).
conjunction
Light-Year
tectonics of Mars
Apparent Magnitude
15. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.
Umbra
Particle Horizon
resonance
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
16. 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.
Wein's Law
CMB
aphelion
Maria
17. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.
regolith
Hydrostatic Equilibrium
quarks
Sc spiral galaxy
18. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter
Coronal Loop
Red Giant
neutrino
force
19. The Greek philosopher responsible for making the stellar magnitude scale.
MOONS: larger than mercury
Hipparchus
Synchrotron Rotation
Sa spiral galaxy
20. When the Sun moves from south to north across the celestial equator (about March 21)
Plague
Vernal Equinox
Cepheid variables
Magnification
21. The projection of the Earth's equator onto the celestial sphere.
Geocentric
Celestial Equator
Electromagnetic Radiation: Microwave
quarks
22. Form honeycomb like patterns surrounding empty or nearly empty voids.
superclusters
Focal Length
Differential Rotation
nucleus
23. A younger cluster of stars - found in the galaxy disk
partile horizon
quasar
Open Cluster
mare basalt
24. A bright area of higher temperature that often proceeds the formation of sunspots.
Sidereal Day
Plague
Plank's Law
Globular Cluster
25. Ganymede
Spectroscopic Parallax
Callisto (Jupiter)
asteroid
MOONS: largest size
26. Europa
aurora
Corona
Eclipses of the Moons of Jupiter
MOONS: roundest shape
27. The dark - relativley smooth areas on the moon; Latin for sea
force
Maria
Chromosphere
If it is in a denser medium - such as glass - it will move slower
28. The telescope configuration that has the focus placed at the back of the primary mirror
Zenith
Kuiper belt
Cassegrain Focus
Hyashi track
29. Electromagnetic Radiation
great red spot
Cosmic Microwave Background (CMB)
A family of radiant energy- includes light
critical density
30. 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.
mapping the structure of Milky Way disk
regolith
Maria
Disk
31. Mercury
smallest diameter
inferior planets
Secondary Mirror
AGN
32. Any class of objects with a uniform luminosity used to determine distance.
Ionization
least dense
The Big Bang Theory
standard candle
33. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.
Pulsar
The Big Bang Theory
Cosmic Microwave Background (CMB)
Gamma ray bursts
34. The entity from which the whole universe is postulated to have come from.
cosmic singularity
anorthosite
Big Crunch
Density Wave
35. Earth
Grand design spirals
Synodic Day
Most dense
Quasar
36. Ganymede
general star population
MOONS: largest size
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.
Halo
37. The rock that makes up the lunar highlands
Largest diameter
300000 KM/sec
dark energy
anorthosite
38. A star without enough mass to begin hydrogen fusion
Resolving Power
Brown dwarf
Spectral Lines
slowest rotation
39. The law stating that hotter blackbodies look bluer than cooler blackbodies.
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40. The distance between a lens and its focal plane
meteorite
Planck time
era of recombination
Focal Length
41. Venus
Thickest atmosphere
Atomic Number
self-propagating star formation
cosmological red shift
42. The distance light travels in one year (=9.46x10^12km).
force
Light-Year
Cepheid Variable
matter dominated universe
43. 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.
Asymptotic giant Branch Star
Zenith
Cassegrain Focus
difference between maria and highlands of the moon.
44. Large nebula consisting of very cold gas and dust
Negative - Diverge - Less than 1
Liquid metallic hydrogen
Molecular Clouds
Astronomical Unit
45. 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.
Pixel
era of recombination
Differential Rotation
Degeneracy
46. Hydrogen and helium (mainly)
Stephen-Boltzman Law
Make up of the jovian planets
Spectral Lines
Focal Plane
47. 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)
Superior planets
Doppler Shift
Metals
Eyepiece Lens
48. An empirical scheme for predictin ghe orbital distances of planets
Kirchhoff's Law
meteor shower
Photometry
Titus-Bode Law
49. The point in its orbit where a planet is nearest the sun
Trojan asteroids
Horizontal Branch Star
White Dwarf
Perihelion
50. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE
contrast northern lowlands and the southern highlands of mars...
semimajor axis
Annular Eclipse
Europa (Jupiters moon)