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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 philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.
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2. The shadow area behind the Earth or Moon where the Sun is completely obscured.
Eyepiece Lens
Umbra
Bulge
Thickest atmosphere
3. Why does the earth have few craters while the moon has many?
Extrasolar Planet
Light-Year
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Light Pollution
4. The area behind a lens where images are resolved
Apollo asteroids
Triple Alpha rocess
Focal Plane
Largest diameter
5. A word meaning 'the same everywhere throughout.'
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.
critical density
homogeneous
semimajor axis
6. 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
Jupiters red spot
Cosmic Microwave Background (CMB)
coma
Cepheid variables
7. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting
Light Pollution
Hubble law
Big Crunch
Electromagnetic Radiation: Infrared
8. The gap inthe outer portion of Saturn's A ring
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.
Sunspots
Enke gap
Light Pollution
9. The sinking of denser elements to the center of a young molten planet
Milky way Galaxy
chemical differentiation
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.
Black Hole
10. A force exerted by reflecting sunlight
Total Eclipse
Chandrasekhar Limit
cosmic fireball
radiation pressure
11. The number of protons in an atom.
dark energy
Grand design spirals
Atomic Number
Eclipses of the Moons of Jupiter
12. An entity that is likely in the nucleus of most - if not all - galaxies.
Cepheid variables
supermassive black hole
HII Region
3 reasons we orbit satellites to observe universe
13. A spinning neutron star
Spectroscopy
Pulsar
radio lobe
Photon
14. The first rock-sized bodies that formed in the solar nebula from dust grains
Sc spiral galaxy
Brown dwarf
Brown dwarf
chondrite
15. A distance measure determined by the shifting of a star against the background sky every 6 months.
Parsec
opposition
Olber's paradox
Kirchhoff's Law
16. 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.
contrast northern lowlands and the southern highlands of mars...
Seyfert galaxy
fusion crust
Halo
17. The measure of a variable star's apparent magnitude as it brightens and dims with time
Bulge
Resolving Power
quasar
Light Curve
18. Moon in less than the angular diameter of the Sun.
Eyepiece Lens
Annular Eclipse
supermassive black hole
Callisto (Jupiter)
19. The crust of a meteorite caused by its entry into Earth's atmosphere
Summer Solstice
fusion crust
Flat - Remain Parallel - Exactly 1
Ole Roemer
20. How did Earth come to have an oxygen rich atmosphere?
Sa spiral galaxy
Shepherd satellite
Supercluster
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.
21. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)
highlands
cosmological principle
Big Bang
Active Optics
22. The apparent backward motion of a planet against the background of stars.
retrograde motion
direct motion
chondrite
Summer Solstice
23. Neptune or uranus
Dark Matter
Coldest surface
Planetary Nebula
Hipparchus
24. Mercury
Roundest orbit
smallest diameter
mass
Make up of the jovian planets
25. A galaxy sending out a stream of material from its nucleus
Coronal Loop
Colestial Pole
Radio Galaxy
Europa (Jupiters moon)
26. A plot of star absolute magnitude verses spectral type.
H-are Diagram
Kuiper belt
Celestial Sphere
Sb spiral galaxy
27. The gap etween saturn's A and B rings
Electromagnetic Radiation: Infrared
chemical differentiation
meteorite
Cassini division
28. 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.
Spectral Lines
Cosmological Principle
Absorption Spectrum
Galilean satellite
29. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.
Eyepiece Lens
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.
neutrino
self-propagating star formation
30. An element of a highly efficient - two-dimensional electronic light detector
H-are Diagram
Cepheid Variable
Focal Plane
Pixel
31. The surface of the sun
Light-Year
belt
Photosphere
Sc spiral galaxy
32. Moon in less than the angular diameter of the Sun.
Annular Eclipse
Chromosphere
Gamma-ray Burst
mapping the structure of Milky Way disk
33. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:
Differential Rotation
Drake equation
tectonics of Mars
slowest rotation
34. When the Sun moves from south to north across the celestial equator (about March 21)
Vernal Equinox
Electromagnetic Radiation
Neutron Star
Kirkwood gaps
35. Any change in the speed or direction of an object's motion
acceleration
Main Sequence
Ammonia - methane - and water
Primary Mirror
36. A small and dim but hot star.
interstellar dust
Photon
Triple Alpha rocess
White Dwarf
37. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)
fastest rotation
Annular Eclipse
Dark matter candidates
Seeing
38. 10 cm -> 1 mm
Electromagnetic Radiation: Infrared
Electromagnetic Radiation
comet
Electromagnetic Radiation: Microwave
39. Why do Galaxies move very rapidly in the interiors of the dense clusters?
nucleus
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Flare
Inverse Square Law
40. The most mass a white dwarf can have before collapsing to a neutron star
Kirchhoff's Law
OB Associations
Rich vs poor clusters
Chandrasekhar Limit
41. A point in the sky where meteors appear to come from during a shower
Winter Solstice
Ionization
radiant
plate tectonics
42. A change in the appearance of the sun at the edge of the solar disk
Gravitational Lens
direct motion
Limb darkening
Hydrostatic Equilibrium
43. The mass of an object divided by its volume
Shepherd satellite
CCD
belt
density
44. An energetic event taking place in the early universe
anorthosite
Population 1 vs Population 2 stars
Gamma-ray Burst
Total Eclipse
45. The apparent magnitude a star would have if it were at a distance of 10 parsecs.
dark energy
Absolute Magnitude
Molecular Clouds
bulge
46. Elliptical orbits that come inside orbit of the Earth.
resonance
Apollo asteroids
Light Gathering Power
density
47. The force of attraction between any two objects having mass
Black Hole
gravity
zone
radiant
48. A perfect absorber and radiator of electromagnetic radiation.
Blackbody
AGN
Annular Eclipse
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
49. The family of radiant energy that includes light as a subset
Color Index
zone
Reflector
Electromagnetic Radiation
50. The equation that describes how matter equates with energy
Photometry
Light: travels like a wave - detected like a particle
direct motion
E=mc2