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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. Is there water on the moon?
Yes - frozen at the poles- remains protected from the suns rays
The Big Bang Theory resolves Olber's Paradox
CCD
weight
2. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.
Stephen-Boltzman Law
Asymptotic giant Branch Star
3 reasons we orbit satellites to observe universe
hottest surface
3. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.
How is winding dilemma solved?
quasar
Dark Matter
Disk
4. A faint - remarkably uniform distribution of radiation in space
Callisto (Jupiter)
Vernal Equinox
Cosmic Microwave Background
CNO Cycle
5. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.
Sunspot cycle
anorthosite
radiation pressure
Enke gap
6. The movement of the Earth's crustal plates riding on top of the mantle.
Kuiper belt
plate tectonics
supermassive black hole
Self-Propogating Star Formation
7. The source of the force that is accelerating the expansion rate of the universe.
shape and color of SPIRAL galaxies
Io (jupiters moon)
Plank's Law
dark energy
8. Is space infinitely large?
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9. When material is heated and moves taking the heat energy with it
H-are Diagram
Convection
Light Pollution
open star clusters
10. The normal eastward movement of a planet against the background of hte distant stars.
Apparent Magnitude
direct motion
roche limit
partile horizon
11. Comglomerates of ice and rock that orbit the sun in highly elliptical paths
Umbra
Blackbody Curve
Bok Globule
comet
12. 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.
Flocculent spirals
regolith
Oort Cloud
Prominence
13. A logarithmically scaled value for the measured brightness of a star.
Wein's Law
Differential Rotation
Apparent Magnitude
Parallax
14. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto
Hydrostatic Equilibrium
Kuiper belt
general star population
Halo
15. A representation of the changes in color and brightness of an evolving protostar.
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.
molecular clouds
Hyashi track
Light Pollution
16. The science of measuring light energy by wavelength.
open star clusters
White Dwarf
chondrite
Spectroscopy
17. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc
protostar
belt
critical density
Make up of the terrestrial planets
18. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)
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.
general star population
planetary nebula
radiation pressure
19. 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.
Parallax
Electromagnetic Radiation: Infrared
Blackbody Curve
Electromagnetic Radiation: Radio
20. The part of the Milky way that has on-going star formation
Emission Spectrum
resonance
Disk
Yes - frozen at the poles- remains protected from the suns rays
21. Venus
Roundest orbit
MOONS: roundest shape
CMB
radio galaxy
22. Collections of young - hot stars
regolith
Colestial Pole
OB Associations
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
23. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE
retrograde motion
MOONS: largest size
Instability strip
Europa (Jupiters moon)
24. 10 cm -> 1 mm
Electromagnetic Radiation: Microwave
Spectroscopic Parallax
Self-Propogating Star Formation
radiation dominated universe
25. The name for the only seriously considered theory of the universe.
Big Bang
Degeneracy
Red Giant
era of recombination
26. A term referring to Jupiter-like planets
Black Hole
Roundest orbit
jovian
Callisto (Jupiter)
27. A galaxy emitting large amounts of energy at long wavelengths.
radio galaxy
Extrasolar Planet
White Dwarf
radio lobe
28. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals
contrast northern lowlands and the southern highlands of mars...
Dark Nebula
asteroid
Convection
29. The science of measuring the apparent magnitudes of stars by imaging them through different filters.
standard candle
Sidereal Day
Photometry
Electromagnetic Radiation: Visible Light
30. How did Earth come to have an oxygen rich atmosphere?
Vernal Equinox
Supercluster
coma
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.
31. The shadow behind the Earth or Moon where the Sun is partially obscured.
Penumbra
Sc spiral galaxy
aurora
homogeneous
32. In Ptolemy's geocentric solar system - the small circle on which a planet moved.
Seyfert galaxy
epicycle
Cepheid Variable
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.
33. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies
Nebula
critical density
density parameter
Quasar
34. The light produced when particles from the sun collide with atmospheric molecules
aurora
Kuiper belt
Light-Year
cosmological principle
35. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.
era of recombination
Secondary Mirror
Radio Galaxy
Supercluster
36. A quantity measuring the stability of the Earth's atmosphere
Rich Cluster
Seeing
Cassegrain Focus
Halo
37. 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
Steady State Theory (Leads to Olber's Paradox)
How is winding dilemma solved?
300000 KM/sec
Asymptotic giant Branch Star
38. The force of attraction between any two objects having mass
general star population
comet
300000 KM/sec
gravity
39. 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.
Blackbody Curve
Synchrotron Rotation
Disk
open star clusters
40. A very dense - highly populated cluster of galaxies
Geocentric
Rich Cluster
Thermal Equilibrium
Planetary Nebula
41. Clouds of low density gas often found glowing faintly on either side of an AGN.
radio lobe
Chandrasekhar Limit
Enke gap
Instability strip
42. What are the three possible geometries of the universe?
Open - flat - and closed.
Make up of the jovian planets
Absolute Magnitude
Ammonia - methane - and water
43. Matter that reveals itself only through its gravitational attraction
How is winding dilemma solved?
Ole Roemer
Dark Matter
comet
44. Form honeycomb like patterns surrounding empty or nearly empty voids.
superclusters
Cosmic Microwave Background (CMB)
Meridian
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.
45. The study of the universe as a whole.
cosmology
Main Sequence
Kuiper belt
shape and color of SPIRAL galaxies
46. What are the three possible geometries of the universe?
Open - flat - and closed.
Light-Year
Density Wave
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.
47. The rotation period of the Earth measured relative to the Sun.
Penumbra
Dark Matter
Synodic Day
E=mc2
48. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging
Energy Level
CCD
epicycle
Magnification
49. Either Io -Europa - Ganymede - or Callisto
slowest rotation
Galilean satellite
density
greatest elongation
50. 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.
mapping the structure of Milky Way disk
reflection star clusters
Positive - Converge - Greater than 1
Pixel