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Test your basic knowledge |
Cosmology
Start Test
Study First
Subject
:
science
Instructions:
Answer 50 questions in 15 minutes.
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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. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)
Degeneracy
Chandrasekhar Limit
How is winding dilemma solved?
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
2. Sc galaxies
Cosmic Microwave Background
Flat - Flat
Geocentric
Flocculent spirals
3. 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
comet
anorthosite
supernova
Maria
4. The distance a moon can be from a planet before shattering from tidal forces
Objective Lens
widmanstatten pattern
roche limit
Electromagnetic Radiation
5. A telescope that uses mirrors to focus light
Reflector
Ground State
Jovian Planets
White Dwarf
6. The source of the force that is accelerating the expansion rate of the universe.
Light Curve
dark energy
Neutron Star
aurora
7. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth
Sa spiral galaxy
homogeneous
Ammonia - methane - and water
Neutron Star
8. The entity from which the whole universe is postulated to have come from.
force
White Dwarf
cosmic singularity
hottest surface
9. The rotation of a star or planet at different speeds at its equator and poles
Cosmological Principle
differential rotation
Bulge
Liquid metallic hydrogen
10. The slow wobble of the Earth on its rotation axis.
Precession
Chandrasekhar Limit
retrograde motion
epicycle
11. Venus
Thickest atmosphere
opposition
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Gamma ray bursts
12. The law that predicts the possible types of spectra.
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13. The study of the universe as a whole.
zone
White Dwarf
Electromagnetic Radiation
cosmology
14. Very center of galaxy. suggestion of a black hole
Big Crunch
nucleus
radio galaxy
least dense
15. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the
OB Associations
The Big Bang Theory
inferior planets
Open Cluster
16. A star without enough mass to begin hydrogen fusion
superclusters
Open - flat - and closed.
neutrino
Brown dwarf
17. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas
HII Region
Oort cloud
Superior planets
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.
18. A long-lived high-pressure bulge in Jupiter's southern hemisphere
Parallax
great red spot
general star population
Stephen-Boltzman Law
19. A small and dim but hot star.
mapping the structure of Milky Way disk
great red spot
White Dwarf
Atomic Number
20. The oldest grouping of stars - found in the galaxy halo
Electromagnetic Radiation: X-Ray
Globular Cluster
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Neutron Star
21. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas
accretion disk
Granules
Supernova (You can be my supernova girl)
HII Region
22. Titan
MOONS: thickest atmosphere
Electromagnetic Radiation: Ultraviolet Light
plate tectonics
conjunction
23. The fusion process that turns three helium nuclei into a carbon nucleus
CNO Cycle
density waves
Enke gap
Triple Alpha rocess
24. The movement of the Earth's crustal plates riding on top of the mantle.
Most dense
regolith
plate tectonics
nova
25. The area behind a lens where images are resolved
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.
Density Wave
terrestrial planet
Focal Plane
26. A subatomic particle with a negative charge. It creates light.
thinnest atmosphere
Convection
interstellar dust
Electron
27. The dark - relativley smooth areas on the moon; Latin for sea
Light-Year
Maria
Light Curve
Inverse Square Law
28. A small round distribution of gas surrounding a dying star
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.
protostar
Planetary Nebula
critical density
29. When one side of a body always faces the planet it revolves around
synchronous rotation
Light: travels like a wave - detected like a particle
zone
Thermal Equilibrium
30. A perfect absorber and radiator of electromagnetic radiation.
Blackbody
Spectroscopy
Grand design spirals
Electromagnetic Radiation: Infrared
31. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.
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32. The measure of a variable star's apparent magnitude as it brightens and dims with time
Absolute Magnitude
jovian
general star population
Light Curve
33. Possible Fates of the Universe
Extrasolar Planet
era of recombination
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
meteoriod
34. In what chemical form are jupiters nitrogen - carbon and oxygen?
evidence of water on mars
Open Cluster
Ammonia - methane - and water
Largest diameter
35. Jupiter
blazar
Heliocentric
Largest diameter
Red Giant Branch Star
36. The lens in a telescope used to determine the magnification
Extrasolar Planet
Heliocentric
Red Giant
Eyepiece Lens
37. A location on an H-are Diagram where evolving stars pulsate
A family of radiant energy- includes light
cosmological red shift
Instability strip
differential rotation
38. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.
chemical differentiation
Open Cluster
self-propagating star formation
Superior planets
39. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.
Sunspot cycle
Atomic Number
isotropic
Electromagnetic Radiation: Visible Light
40. 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)
Doppler Shift
tectonics of Venus
planetary nebula
Open - flat - and closed.
41. The science of measuring the apparent magnitudes of stars by imaging them through different filters.
Black Hole
highlands
Photometry
Spectroscopic parallax
42. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.
quasar
The Local Group
Electromagnetic Radiation
density parameter
43. The surface of the sun
Photosphere
Neutron Star
Particle Horizon
Hubble constant
44. Centered on the Earth
How is winding dilemma solved?
Radiative Diffusion
Geocentric
Winter Solstice
45. Titan
Resolving Power
MOONS: thickest atmosphere
gravity
Meridian
46. The projection of the Earth's equator onto the celestial sphere.
Celestial Equator
Absorption Spectrum
Gamma-ray Burst
fewest moons
47. 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.
Limb darkening
Atomic Number
tectonics of Mars
open star clusters
48. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)
Cosmological Principle
neutrino
rotation curve=winding dilemma?
How is winding dilemma solved?
49. 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.
Hydrostatic Equilibrium
deferent
Pixel
Spectroscopic parallax
50. 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.
Oort Cloud
Granules
MOONS: roundest shape
era of recombination
Sorry!:) No result found.
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