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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. A small chunk of rock in space
Absolute Magnitude
radio lobe
meteoriod
Hyashi track
2. 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.
Nucleus
Sc spiral galaxy
Population 1 vs Population 2 stars
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
3. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth
direct motion
Sa spiral galaxy
The Local Group
matter dominated universe
4. A collection of galaxies like the one the Milky Way belongs to
Sb spiral galaxy
Poor Cluster
Open Cluster
molecular clouds
5. The telescope configuration that has the focus placed at the back of the primary mirror
Corona
smallest diameter
Plague
Cassegrain Focus
6. A star that blows itself apart
Flat - Flat
Planetary Nebula
Supernova (You can be my supernova girl)
Pixel
7. Jupiter
Thickest atmosphere
most moons
plate tectonics
Flat - Remain Parallel - Exactly 1
8. 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.
gravity
Liquid metallic hydrogen
Cosmological Principle
Hubble constant
9. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use
Nova
Hubble law
Magnification
Shepherd satellite
10. A particle of light.
mapping the structure of Milky Way disk
isotropic
condensation temperature
Photon
11. Large nebula consisting of very cold gas and dust
inferior planets
deferent
radio galaxy
Molecular Clouds
12. A star that is burning hydrogen to helium in a shell surrounding it's core
Nebula
Black Hole
Red Giant Branch Star
mass
13. When massive objects bend space and time enough to create multiple images of an object located behind them
Geocentric
Gravitational Lens
HII Region
The Big Bang Theory resolves Olber's Paradox
14. Matter that reveals itself only through its gravitational attraction.
Spectroscopic Parallax
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
dark matter
Parallax
15. A faint - remarkably uniform distribution of radiation in space
fastest rotation
mapping the structure of Milky Way disk
Cosmic Microwave Background
Negative - Diverge - Less than 1
16. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
H2 Regions
Precession
Positive - Converge - Greater than 1
scarp
17. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)
Dark matter candidates
MOONS: thickest atmosphere
tectonics of Earth
Most dense
18. Mercury - Venus - Earth - Mars
Terrestrial Planets
Particle Horizon
Rich Cluster
Perihelion
19. The elementary building blocks from which protons and neutrons are formed.
mass
Negative - Diverge - Less than 1
Eyepiece Lens
quarks
20. The law that syas light energy from a blackbody increases as (temperature^4)
rotation curve=winding dilemma?
Bulge
Stephen-Boltzman Law
Refractor
21. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE
Population 1 vs Population 2 stars
shape and color of ELLIPTICAL galaxies
Callisto (Jupiter)
anorthosite
22. The place in the sky that the Earth's axis points toward (can be either north or south)
Colestial Pole
Kuiper belt
contrast northern lowlands and the southern highlands of mars...
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
23. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes
Apollo asteroids
Black Hole
radio galaxy
Resolving Power
24. Why do Galaxies move very rapidly in the interiors of the dense clusters?
Meridian
dark energy
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Galilean satellite
25. 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
Nova
Asymptotic giant Branch Star
Cassegrain Focus
Sunspot cycle
26. A quantity measuring the stability of the Earth's atmosphere
MOONS: largest size
Electromagnetic Radiation: Radio
Seeing
Europa (Jupiters moon)
27. The slow wobble of the Earth on its rotation axis.
MOONS: roundest shape
Globular Cluster
Precession
great dark spots
28. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals
Largest diameter
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
asteroid
radiation dominated universe
29. An empirical scheme for predictin ghe orbital distances of planets
Planetary Nebula
Titus-Bode Law
H-are Diagram
protostar
30. Moon in less than the angular diameter of the Sun.
MOONS: roundest shape
inferior planets
mare basalt
Annular Eclipse
31. A representation of the changes in color and brightness of an evolving protostar.
Sunspot cycle
AGN
Blackbody Curve
Hyashi track
32. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies
Nebula
Chandrasekhar Limit
Neutron Star
chondrite
33. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.
belt
Milky way Galaxy
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
Photometry
34. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.
quasar
Radio Galaxy
Halo
Disk
35. The material from which the solar system formed
differential rotation
widmanstatten pattern
Turn off Point
solar nebula
36. The oldest grouping of stars - found in the galaxy halo
regolith
Bok Globule
Globular Cluster
radiation dominated universe
37. Matter that reveals itself only through its gravitational attraction
standard candle
Sunspot cycle
Dark Matter
Particle Horizon
38. The gap etween saturn's A and B rings
Electromagnetic Radiation: Radio
Cassini division
Sunspots
Umbra
39. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.
Self-Propogating Star Formation
Electromagnetic Radiation: Radio
Convection
Gamma ray bursts
40. 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
Annular Eclipse
MOONS: larger than mercury
Cepheid variables
Photon
41. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.
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42. Comglomerates of ice and rock that orbit the sun in highly elliptical paths
homogeneous
great red spot
comet
Planck time
43. All possible types of energy that can be emitted and absorbed by atoms.
Neutron Star
Secondary Mirror
Electromagnetic Radiation
Magnification
44. A huge sphere of tenuous gas surrounding the nucleus of a comet
coma
Objective Lens
accretion disk
CMB
45. How did Earth come to have an oxygen rich atmosphere?
nova
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.
Color Index
cosmology
46. The distance light travels in one year (=9.46x10^12km).
thinnest atmosphere
Light-Year
Main Sequence Stars
Refractor
47. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)
fewest moons
Cassegrain Focus
Neutron Star
greatest elongation
48. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)
direct motion
terrestrial planet
Seeing
Oort cloud
49. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)
Plague
Light: travels like a wave - detected like a particle
Density Wave
Precession
50. A quantity measuring the stability of the Earth's atmosphere
Seeing
Light Gathering Power
CMB
Big Bang