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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. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)
fewest moons
How is winding dilemma solved?
Rich Cluster
general star population
2. A subatomic particle with a negative charge. It creates light.
Photon
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.
Electron
Objective Lens
3. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process
CNO Cycle
standard candle
Self-Propogating Star Formation
mass
4. A rock or iron specimen that has fallen from space
meteorite
Kuiper belt
Milky way Galaxy
Black Hole
5. Ganymede
Seeing
greatest elongation
MOONS: largest size
accretion
6. 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)
Doppler Shift
Turn off Point
radiant
hottest surface
7. 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.
direct motion
accretion
chondrite
Population 1 vs Population 2 stars
8. Clouds of low density gas often found glowing faintly on either side of an AGN.
fusion crust
partile horizon
radio lobe
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
9. Saturn
chondrite
Jovian Planets
Secondary Mirror
least dense
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.
tectonics of Venus
chondrite
Electromagnetic Radiation: Ultraviolet Light
Oort Cloud
11. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE
Olber's paradox
Jovian Planets
Europa (Jupiters moon)
epicycle
12. The equation that describes how matter equates with energy
great red spot
E=mc2
Magnification
comet
13. The entity from which the whole universe is postulated to have come from.
cosmic singularity
partile horizon
Metals
differential rotation
14. A telescope that uses mirrors to focus light
Titus-Bode Law
protostar
Eyepiece Lens
Reflector
15. 1 mm 1μm
slowest rotation
300000 KM/sec
Electromagnetic Radiation: Infrared
Spectral Lines
16. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.
Continuous Spectrum
Photon
interstellar dust
nova
17. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.
Kuiper belt
Main Sequence
Halo
cosmological principle
18. The lowest energy of an atom.
Ground State
Positive - Converge - Greater than 1
Colestial Pole
most moons
19. The mirror that determines the focus configuration of a reflector
Secondary Mirror
protostar
Supernova (You can be my supernova girl)
Electromagnetic Radiation: X-Ray
20. A phenomenon seen when the Earth passes through the orbit of a burned out comet
meteor shower
tectonics of Venus
Thermonuclear Fusion
general star population
21. A change in the appearance of the sun at the edge of the solar disk
great red spot
radio lobe
Limb darkening
aurora
22. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula
Parallax
reflection star clusters
Quasar
MOONS: larger than mercury
23. The process that powers the sun and hydrogen bombs
OB Associations
Perihelion
Flare
Thermonuclear Fusion
24. The lens that gathers the light in a refractor
quasar
supernova
Halo
Objective Lens
25. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere
Lagrangian Razor
Active Optics
aphelion
rotation curve = dark matter?
26. All wavelengths of light emitted by a blackbody.
Sunspots
Kirkwood gaps
The Big Bang Theory resolves Olber's Paradox
Blackbody Curve
27. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting
Big Crunch
Asymptotic giant Branch Star
neutrino
Electromagnetic Radiation: Microwave
28. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)
H2 Regions
Spectroscopy
planetesimal
Thermal Equilibrium
29. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker
SETI
Seyfert galaxy
Absolute Magnitude
general star population
30. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.
Io (jupiters moon)
thinnest atmosphere
meteorite
Sunspot cycle
31. A galaxy emitting large amounts of energy at long wavelengths.
Cassini division
radio galaxy
tectonics of Venus
cosmology
32. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.
partile horizon
accretion disk
great red spot
nova
33. The crust of a meteorite caused by its entry into Earth's atmosphere
CNO Cycle
fusion crust
Io (jupiters moon)
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
34. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)
Horizontal Branch Star
dark energy
Cepheid variables
H2 Regions
35. First accurately measured the speed of light in a vacuum
Ole Roemer
Differential Rotation
SETI
Kuiper belt
36. Jupiter
accretion disk
resonance
most moons
Kuiper belt
37. Material that shoots rapidly out into space. Flares cause Auroras
Spectral Lines
Neutron Star
planetary nebula
Flare
38. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas
Apollo asteroids
Occam's razor
HII Region
Coronal Loop
39. 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
Supernova (You can be my supernova girl)
Blackbody
Cepheid variables
evidence of water on mars
40. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)
opposition
Apparent Magnitude
Electromagnetic Radiation: Visible Light
Sb spiral galaxy
41. Any class of objects with a uniform luminosity used to determine distance.
Cepheid variables
standard candle
fusion crust
Population 1 vs Population 2 stars
42. A prominence seen against the disk of the sun
Make up of the terrestrial planets
Filament
Spectroscopy
Dark matter candidates
43. A term referring to Earth-like planets
Nucleus
Light: travels like a wave - detected like a particle
Ecliptic
terrestrial planet
44. The powdered stone fragments that make up the lunar 'soil'
regolith
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 matter candidates
Total Eclipse
45. An energetic event taking place in the early universe
Total Eclipse
Gamma-ray Burst
Prominence
Sidereal Day
46. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.
Objective Lens
Vernal Equinox
tectonics of Mars
most moons
47. When the Moon entirely blocks the Sun.
Electromagnetic Radiation
Total Eclipse
Bulge
Colestial Pole
48. The distance between a lens and its focal plane
Ganymede (Jupiter)
reflection star clusters
Focal Length
aphelion
49. Venus
Grand design spirals
Thickest atmosphere
Electromagnetic Radiation
Make up of the jovian planets
50. A location on an H-are Diagram where evolving stars pulsate
Planck time
Instability strip
conjunction
Winter Solstice