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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 lens in a telescope used to determine the magnification
E=mc2
inferior planets
Eyepiece Lens
Open Cluster
2. Clouds of low density gas often found glowing faintly on either side of an AGN.
Ammonia - methane - and water
radio lobe
Population 1 vs Population 2 stars
Kirchhoff's Law
3. Dark areas on the sun that are cooler than the surrounding photosphere
Flocculent spirals
Sunspots
Thermal Equilibrium
Spectroscopic Parallax
4. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
Positive - Converge - Greater than 1
Ground State
Cosmic Microwave Background
Apollo asteroids
5. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)
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.
blazar
Summer Solstice
direct motion
6. Matter so dense that even light cannot escape its gravity
inferior planets
Black Hole
MOONS: largest size
Dark Matter
7. 100 nm 10 nm
Electromagnetic Radiation: Ultraviolet Light
Perihelion
Jupiters red spot
Nova
8. A younger cluster of stars - found in the galaxy disk
Wein's Law
White Dwarf
Open Cluster
Vernal Equinox
9. The fusion process that turns three helium nuclei into a carbon nucleus
meteor
Triple Alpha rocess
era of recombination
aphelion
10. A streak of light in the atmosphere
meteor
plate tectonics
Wein's Law
chondrite
11. Collections of young - hot stars
Atomic Number
Continuous Spectrum
OB Associations
Meridian
12. A bright area of higher temperature that often proceeds the formation of sunspots.
Light Curve
Plague
reflection star clusters
Electron
13. The powdered stone fragments that make up the lunar 'soil'
Occam's razor
SETI
regolith
Cosmological Principle
14. 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
Stephen-Boltzman Law
The Big Bang Theory
Milky way Galaxy
Most dense
15. When particles are compressed to an unnatural state where their pressure is not related to their temperature
Plank's Law
Degeneracy
Flat - Flat
terrestrial planet
16. A subatomic particle with a negative charge. It creates light.
Electron
isotropic
Magnification
Ganymede (Jupiter)
17. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE
Europa (Jupiters moon)
difference between maria and highlands of the moon.
Molecular Clouds
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
18. The name for the only seriously considered theory of the universe.
Most dense
Continuous Spectrum
tectonics of Mars
Big Bang
19. Venus
Thickest atmosphere
fusion crust
Filament
direct motion
20. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.
radio lobe
radio galaxy
greehouse effects
MOONS: most geologically active
21. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.
greehouse effects
Ole Roemer
quasar
cosmology
22. Why do Galaxies move very rapidly in the interiors of the dense clusters?
Photometry
Electron
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
self-propagating star formation
23. A repeated - periodic push or pull capable of summing into a larger push or pull
resonance
Cosmological Principle
Cepheid variables
Focal Plane
24. A measure of the ability of a telescope to see fine detail
Resolving Power
Dark Matter
interstellar dust
Blackbody Curve
25. When the Sun moves from south to north across the celestial equator (about March 21)
Vernal Equinox
density waves
mare basalt
Radiative Diffusion
26. The gap etween saturn's A and B rings
Enke gap
Kirkwood gaps
Cassini division
inferior planets
27. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years
H-are Diagram
Atomic Number
Hipparchus
Milky way Galaxy
28. The process of acquiring material
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
rotation curve=winding dilemma?
quarks
accretion
29. Hot cells of gas that rise and fall in the hotosphere
Flat - Remain Parallel - Exactly 1
asteroid
Granules
Eyepiece Lens
30. The lens that gathers the light in a refractor
reflection star clusters
Absorption Spectrum
Objective Lens
Dwarf planets
31. A term referring to the orbital character of stars near the Sun
Dark Nebula
Neutron Star
Ionization
Differential Rotation
32. In Ptolemy's geocentric solar system - the small circle on which a planet moved.
superclusters
epicycle
open star clusters
rotation curve = dark matter?
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:
Ammonia - methane - and water
Doppler Shift
The Local Group
Drake equation
34. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.
density parameter
tectonics of Mars
Neutron Star
Nebula
35. A star that is burning hydrogen to helium in a shell surrounding it's core
Electromagnetic Radiation
Red Giant Branch Star
evidence of water on mars
Proton-proton chain
36. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object
Spectroscopic parallax
planetesimal
mass
Radio Galaxy
37. A faint - remarkably uniform distribution of radiation in space
CMB
Cosmic Microwave Background
Sc spiral galaxy
Red Giant Branch Star
38. A term referring to Jupiter-like planets
Metals
greehouse effects
Steady State Theory (Leads to Olber's Paradox)
jovian
39. Half of the longest diameter across an ellipse
semimajor axis
cosmology
Grand design spirals
most eccentric orbit
40. A star without enough mass to begin hydrogen fusion
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
If it is in a denser medium - such as glass - it will move slower
Milky way Galaxy
Brown dwarf
41. A word meaning 'the same in all directions.'
High Velocity Stars
Nebula
radiation pressure
isotropic
42. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc
Penumbra
Supernova (You can be my supernova girl)
Neutron Star
critical density
43. The point in its orbit where a planet is farthest from the sun
highlands
aphelion
High and low pressure which stretch into bands due to the rapid differential rotation. deeper - darker colors are in the belts and zones are lighter
Annular Eclipse
44. An object that may remain after a star explodes
Light-Year
molecular clouds
homogeneous
Neutron Star
45. The apparent magnitude a star would have if it were at a distance of 10 parsecs.
Nucleus
molecular clouds
Celestial Sphere
Absolute Magnitude
46. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation
fewest moons
Black Hole
disk
Cosmological Principle
47. The location of a supermassive black hole
radiation dominated universe
Blackbody Curve
Nucleus
The Big Bang Theory
48. 1 mm 1μm
general star population
Poor Cluster
Electromagnetic Radiation: Infrared
fusion crust
49. 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.
asteroid
We don't know. It might be but does not have to be.
Population 1 vs Population 2 stars
Superior planets
50. Why does the earth have few craters while the moon has many?
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Cassegrain Focus
critical density
Umbra