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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. Matter that reveals itself only through its gravitational attraction.
Population 1 vs Population 2 stars
dark matter
regolith
Open - flat - and closed.
2. Clouds of low density gas often found glowing faintly on either side of an AGN.
weight
radio lobe
Nebula
Red Giant
3. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
Coronal Loop
Flat - Remain Parallel - Exactly 1
If it is in a denser medium - such as glass - it will move slower
Focal Length
4. A word meaning 'the same in all directions.'
The Local Group
Umbra
isotropic
Halo
5. The most mass a white dwarf can have before collapsing to a neutron star
Chandrasekhar Limit
general star population
Limb darkening
solar nebula
6. Hydrogen and helium (mainly)
Make up of the jovian planets
Coldest surface
scarp
Radiative Diffusion
7. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.
Extrasolar Planet
Focal Length
Parallax
superclusters
8. The first rock-sized bodies that formed in the solar nebula from dust grains
Ammonia - methane - and water
CNO Cycle
chondrite
Celestial Equator
9. The rock that makes up the lunar highlands
A family of radiant energy- includes light
Magnification
anorthosite
Poor Cluster
10. Where is the center of the expansion
Black Hole
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.
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Total Eclipse
11. A distance measure determined by the shifting of a star against the background sky every 6 months.
force
tectonics of Venus
Parsec
least dense
12. Electromagnetic Radiation
A family of radiant energy- includes light
Planetary Nebula
radio lobe
Stephen-Boltzman Law
13. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation
The Big Bang Theory
Black Hole
meteoriod
AGN
14. The family of radiant energy that includes light as a subset
3 reasons we orbit satellites to observe universe
Filament
radiation dominated universe
Electromagnetic Radiation
15. An object that may remain after a star explodes
Neutron Star
SETI
Big Crunch
Void
16. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)
SETI
Radio Galaxy
greatest elongation
regolith
17. Light-colored high-pressure bands in Jupiter's atmosphere
Callisto (Jupiter)
zone
Eclipses of the Moons of Jupiter
Electromagnetic Radiation
18. The oldest terrain on the moon
highlands
epicycle
resonance
Rich Cluster
19. 1 mm 1μm
Nebula
Electromagnetic Radiation: Infrared
White Dwarf
solar nebula
20. A large and bright but cool star.
most moons
Red Giant
Synchrotron Rotation
Galilean satellite
21. The mix of pure photon energy that emerged at the start of the universe.
Self-Propogating Star Formation
dark matter
Ionization
cosmic fireball
22. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)
rotation curve = dark matter?
Planetary Nebula
Population 1 vs Population 2 stars
difference between maria and highlands of the moon.
23. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t
Asymptotic giant Branch Star
radiant
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Spectroscopic parallax
24. A telescope that uses mirrors to focus light
Most dense
conjunction
Reflector
Celestial Sphere
25. The process responsible for creating the arms of flocculent spiral galaxies
Meridian
shape and color of ELLIPTICAL galaxies
Self-Propogating Star Formation
Supernova (You can be my supernova girl)
26. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)
rotation curve=winding dilemma?
Coronal Loop
Meridian
roche limit
27. Mercury
differential rotation
Hydrostatic Equilibrium
thinnest atmosphere
cosmic singularity
28. 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.
Corona
Sa spiral galaxy
fusion crust
Oort Cloud
29. The point directly overhead.
Zenith
Stephen-Boltzman Law
standard candle
Triple Alpha rocess
30. Dark - reddish - low-pressure bands in Jupiter's atmosphere
belt
Cosmological Principle
solar nebula
semimajor axis
31. Venus (retrograde)
radiation pressure
Kuiper belt
Galilean satellite
slowest rotation
32. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
radiant
Make up of the terrestrial planets
Sc spiral galaxy
plate tectonics
33. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere
Active Optics
anorthosite
greatest elongation
aphelion
34. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)
Total Eclipse
Main Sequence Stars
Hipparchus
Dark matter candidates
35. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)
cosmological principle
Plank's Law
Flocculent spirals
Celestial Sphere
36. A volume of space where few - if any - galaxies are located
Void
density
Olber's paradox
The Big Bang Theory
37. A crystalline patter found in iron meteorites
widmanstatten pattern
Total Eclipse
Population 1 vs Population 2 stars
Kirkwood gaps
38. The north-south line passing directly overhead through the zenith.
Light-Year
Spectroscopic Parallax
Superior planets
Meridian
39. When the Sun moves from south to north across the celestial equator (about March 21)
Cepheid Variable
Vernal Equinox
Poor Cluster
Halo
40. The gap etween saturn's A and B rings
Cassini division
Largest diameter
Rich Cluster
Dwarf planets
41. 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.
Population 1 vs Population 2 stars
Planck time
Plague
Stephen-Boltzman Law
42. A logarithmically scaled value for the measured brightness of a star.
Triple Alpha rocess
tectonics of Venus
Population 1 vs Population 2 stars
Apparent Magnitude
43. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape
Absolute Magnitude
Prominence
bulge
slowest rotation
44. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)
Flocculent spirals
Ganymede (Jupiter)
widmanstatten pattern
blazar
45. The fusion process that turns three helium nuclei into a carbon nucleus
Doppler Shift
greatest elongation
Triple Alpha rocess
CNO Cycle
46. The Greek philosopher responsible for making the stellar magnitude scale.
Atomic Number
Hipparchus
Gravitational Lens
Limb darkening
47. All possible types of energy that can be emitted and absorbed by atoms.
Zenith
Light-Year
Terrestrial Planets
Electromagnetic Radiation
48. A very dense - highly populated cluster of galaxies
If it is in a denser medium - such as glass - it will move slower
isotropic
fastest rotation
Rich Cluster
49. 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
chemical differentiation
open star clusters
tectonics of Earth
50. 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
Inverse Square Law
High Velocity Stars
Ecliptic
Asymptotic giant Branch Star