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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 temp at which a substance in the vacuum of space solidifies
Occam's razor
condensation temperature
radio galaxy
radio galaxy
2. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.
evidence of water on mars
accretion
Drake equation
HII Region
3. The movement of the Earth's crustal plates riding on top of the mantle.
Jupiters red spot
plate tectonics
CCD
Annular Eclipse
4. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process
Electromagnetic Radiation
nucleus
Coldest surface
CNO Cycle
5. 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
aphelion
OB Associations
Largest diameter
6. What Ole Roemer used to measure the speed of light in a vacuum
Eclipses of the Moons of Jupiter
H-are Diagram
Autumnal Equinox
difference between maria and highlands of the moon.
7. A phenomenon seen when the Earth passes through the orbit of a burned out comet
most moons
Jovian Planets
meteor shower
blazar
8. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.
Blackbody
synchrotron radiation
rotation curve=winding dilemma?
least dense
9. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.
Winter Solstice
Neutron Star
Molecular Clouds
acceleration
10. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.
greatest elongation
density waves
tectonics of Earth
radiation dominated universe
11. A word meaning 'the same in all directions.'
solar nebula
Apollo asteroids
isotropic
Color Index
12. A star fusing hydrogen to helium in it's core
protostar
Main Sequence Stars
Electromagnetic Radiation: Microwave
Callisto (Jupiter)
13. The area behind a lens where images are resolved
standard candle
Zenith
regolith
Focal Plane
14. A star that erratically and explosively brightens and dims
Nova
Galilean satellite
Big Crunch
scarp
15. A small and dim but hot star.
Lagrangian Razor
White Dwarf
weight
Extrasolar Planet
16. 10^2 nm 10^7 nm
Electromagnetic Radiation: Gamma Ray
radiation dominated universe
fusion crust
Thermonuclear Fusion
17. Centered on the Earth
Void
standard candle
opposition
Geocentric
18. IO
anorthosite
Cosmic Microwave Background
Horizontal Branch Star
MOONS: most geologically active
19. 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
mapping the structure of Milky Way disk
Cepheid variables
density
synchrotron radiation
20. 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.
Parsec
Parallax
Population 1 vs Population 2 stars
opposition
21. The shadow behind the Earth or Moon where the Sun is partially obscured.
Photometry
Penumbra
Dark Matter
supermassive black hole
22. 10 nm 10^2 nm
great red spot
Make up of the terrestrial planets
Electromagnetic Radiation: X-Ray
Rich vs poor clusters
23. When the Sun is farthest south of the celestial equator (About December 22)
Instability strip
Main Sequence Stars
nova
Winter Solstice
24. Titan
MOONS: thickest atmosphere
Electron
Nova
Grand design spirals
25. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.
molecular clouds
open star clusters
If it is in a denser medium - such as glass - it will move slower
accretion disk
26. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas
HII Region
Apparent Magnitude
300000 KM/sec
most eccentric orbit
27. The 'edge' of the universe. Light beyond this has not reached us yet.
partile horizon
Light Gathering Power
Density Wave
Photon
28. Any class of objects with a uniform luminosity used to determine distance.
Blackbody
great dark spots
Absolute Magnitude
standard candle
29. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this
Celestial Sphere
Kuiper belt
Supercluster
Photosphere
30. Moon in less than the angular diameter of the Sun.
Largest diameter
Red Giant Branch Star
anorthosite
Annular Eclipse
31. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas
Cosmic Microwave Background
Yes - frozen at the poles- remains protected from the suns rays
Halo
Dark Nebula
32. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.
Black Hole
supernova
radio lobe
Filament
33. A phenomenon seen when the Earth passes through the orbit of a burned out comet
Positive - Converge - Greater than 1
Dark matter candidates
meteor shower
interstellar dust
34. Venus
semimajor axis
Light Gathering Power
hottest surface
Roundest orbit
35. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies
Nebula
Radiative Diffusion
Europa (Jupiters moon)
Sunspots
36. A galaxy emitting large amounts of energy at long wavelengths.
Pixel
neutrino
radio galaxy
Gamma-ray Burst
37. Clouds of low density gas often found glowing faintly on either side of an AGN.
radio lobe
meteorite
Liquid metallic hydrogen
acceleration
38. A small spherical dark nebula
era of recombination
Bok Globule
Density Wave
meteor shower
39. A telescope that uses lenses to focus light
Apollo asteroids
Refractor
shape and color of ELLIPTICAL galaxies
planetary nebula
40. The family of radiant energy that includes light as a subset
Galilean satellite
standard candle
Electromagnetic Radiation
Geocentric
41. The slow wobble of the Earth on its rotation axis.
Precession
Photon
mass
resonance
42. When one side of a body always faces the planet it revolves around
Hipparchus
Celestial Sphere
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.
synchronous rotation
43. The rate of expansion of the universe.
Callisto (Jupiter)
Hubble constant
Parsec
aphelion
44. Possible Fates of the Universe
Oort cloud
Cosmological Principle
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
jovian
45. A star that is burning hydrogen to helium in a shell surrounding it's core
Black Hole
HII Region
Vernal Equinox
Red Giant Branch Star
46. A star without enough mass to begin hydrogen fusion
Bok Globule
Eyepiece Lens
hottest surface
Brown dwarf
47. The measure of a variable star's apparent magnitude as it brightens and dims with time
Yes - frozen at the poles- remains protected from the suns rays
semimajor axis
Light Curve
Particle Horizon
48. The entity responsible for spiral arms in grand-design spiral galaxies
Oort Cloud
density
Poor Cluster
Density Wave
49. 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.
density
quasar
difference between maria and highlands of the moon.
mapping the structure of Milky Way disk
50. Very center of galaxy. suggestion of a black hole
nucleus
Triple Alpha rocess
mapping the structure of Milky Way disk
terrestrial planet