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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 apparent magnitude a star would have if it were at a distance of 10 parsecs.
Absolute Magnitude
Black Hole
general star population
Chandrasekhar Limit
2. The distance light travels in one year (=9.46x10^12km).
Pulsar
accretion disk
Light-Year
Differential Rotation
3. A measure of the force of gravity on an object
Heliocentric
Population 1 vs Population 2 stars
weight
Refractor
4. 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)
planetary nebula
Electromagnetic Radiation: Visible Light
quasar
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
5. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.
density waves
Cassegrain Focus
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
E=mc2
6. Hydrogen and helium (mainly)
Make up of the jovian planets
tectonics of Mars
Hubble law
belt
7. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant
rotation curve = dark matter?
Thermal Equilibrium
High Velocity Stars
standard candle
8. The location in the Milky Way where stars orbit like a solid wheel
Flat - Remain Parallel - Exactly 1
Bulge
Inverse Square Law
Supernova (You can be my supernova girl)
9. 100 nm 10 nm
dark energy
chondrite
Celestial Equator
Electromagnetic Radiation: Ultraviolet Light
10. A small spherical dark nebula
Astronomical Unit
plate tectonics
thinnest atmosphere
Bok Globule
11. 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
Flat - Flat
supernova
Light Pollution
12. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?
evidence of water on mars
If it is in a denser medium - such as glass - it will move slower
great dark spots
Molecular Clouds
13. The elementary building blocks from which protons and neutrons are formed.
quarks
radiation dominated universe
Kirchhoff's Law
Dark matter candidates
14. The telescope configuration that has the focus placed at the back of the primary mirror
Heliocentric
Cassegrain Focus
Cosmic Microwave Background
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.
15. A prominence seen against the disk of the sun
Filament
Color Index
Milky way Galaxy
Atomic Number
16. The law that predicts the possible types of spectra.
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17. The relation that tells how light dims with distance.
Inverse Square Law
radiation pressure
Autumnal Equinox
Corona
18. The area behind a lens where images are resolved
Celestial Sphere
Focal Plane
regolith
Quasar
19. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.
300000 KM/sec
Particle Horizon
Flat - Flat
Photon
20. The light produced when particles from the sun collide with atmospheric molecules
superclusters
aurora
tectonics of Earth
Spectral Lines
21. The imaginary sphere centered on the Earth that hols the stars.
Thermonuclear Fusion
Synodic Day
Celestial Sphere
Sb spiral galaxy
22. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
Atomic Number
scarp
Positive - Converge - Greater than 1
Halo
23. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy
Sb spiral galaxy
Parsec
matter dominated universe
Dark Nebula
24. 10^2 nm 10^7 nm
Occam's razor
radiation pressure
Electromagnetic Radiation: Gamma Ray
Planck time
25. A change in the appearance of the sun at the edge of the solar disk
Limb darkening
Seyfert galaxy
Electromagnetic Radiation: Visible Light
Grand design spirals
26. 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.
Trojan asteroids
tectonics of Venus
superclusters
Dark Matter
27. A planet that is closer to the sun than the earth
Convection
zone
inferior planets
standard candle
28. Possible Fates of the Universe
Maria
The Local Group
Electromagnetic Radiation: Radio
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
29. Mercury
Ganymede (Jupiter)
Sa spiral galaxy
most eccentric orbit
meteorite
30. The powdered stone fragments that make up the lunar 'soil'
radiation dominated universe
MOONS: larger than mercury
Electromagnetic Radiation: Radio
regolith
31. A phenomenon seen when the Earth passes through the orbit of a burned out comet
Absolute Magnitude
Neutron Star
meteor shower
MOONS: largest size
32. A high-pressure bulge in Neptune's southern hemisphere
Sunspots
great dark spots
Olber's paradox
Drake equation
33. Venus
Plank's Law
Ground State
blazar
Thickest atmosphere
34. In Ptolemy's geocentric solar system - the small circle on which a planet moved.
Synodic Day
Parsec
epicycle
Open - flat - and closed.
35. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE
Blackbody Curve
dark matter
Hyashi track
Callisto (Jupiter)
36. A faint - remarkably uniform distribution of radiation in space
Cosmic Microwave Background
anorthosite
density waves
MOONS: roundest shape
37. Infinitely long -> 10 cm
Electromagnetic Radiation: Radio
Cassegrain Focus
Triple Alpha rocess
Rich vs poor clusters
38. The mirror that determines the focus configuration of a reflector
CNO Cycle
Summer Solstice
Secondary Mirror
Open - flat - and closed.
39. The lens that gathers the light in a refractor
mass
A family of radiant energy- includes light
Sa spiral galaxy
Objective Lens
40. 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
Nebula
reflection star clusters
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.
Asymptotic giant Branch Star
41. Hot cells of gas that rise and fall in the hotosphere
Granules
Light Pollution
MOONS: roundest shape
Magnification
42. Neptune or uranus
CMB
Void
Parallax
Coldest surface
43. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas
dark matter
Dark Nebula
Dark matter candidates
dark energy
44. 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.
Red Giant Branch Star
A family of radiant energy- includes light
contrast northern lowlands and the southern highlands of mars...
Synodic Day
45. The apparent path of the Sun through the stars on the celestial sphere.
Ecliptic
density parameter
critical density
Apollo asteroids
46. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process
Gamma-ray Burst
accretion
CNO Cycle
shape and color of SPIRAL galaxies
47. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.
differential rotation
greehouse effects
Ionization
most moons
48. 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.
Proton-proton chain
slowest rotation
Oort Cloud
shape and color of SPIRAL galaxies
49. The number of protons in an atom.
roche limit
evidence of water on mars
Atomic Number
standard candle
50. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)
Plank's Law
blazar
Eclipses of the Moons of Jupiter
Kuiper belt