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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 science of measuring the apparent magnitudes of stars by imaging them through different filters.
Apparent Magnitude
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.
greatest elongation
Photometry
2. Milky way galaxy is a member - a small poor cluster-about 30 galaxies
The Local Group
Electromagnetic Radiation
chemical differentiation
contrast northern lowlands and the southern highlands of mars...
3. An element of a highly efficient - two-dimensional electronic light detector
radio galaxy
Filament
shape and color of SPIRAL galaxies
Pixel
4. A younger cluster of stars - found in the galaxy disk
How is winding dilemma solved?
Open Cluster
Spectroscopy
CCD
5. The rock that makes up the lunar maria
neutrino
mare basalt
Meridian
Blackbody
6. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging
nova
Synodic Day
CCD
bulge
7. A galaxy sending out a stream of material from its nucleus
Radio Galaxy
radiation dominated universe
Granules
Maria
8. The material from which the solar system formed
Photon
cosmological principle
300000 KM/sec
solar nebula
9. Jupiter
Largest diameter
Hipparchus
Most dense
zone
10. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)
Planck time
synchrotron radiation
plate tectonics
Poor Cluster
11. Approximate speed of light in a vacuum
300000 KM/sec
Blackbody Curve
Electromagnetic Radiation: Gamma Ray
Radio Galaxy
12. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE
contrast northern lowlands and the southern highlands of mars...
Io (jupiters moon)
disk
Negative - Diverge - Less than 1
13. A planet that is farther from the sun than the Earth is
Grand design spirals
Pixel
Superior planets
aphelion
14. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes
radio lobe
Density Wave
radio galaxy
H2 Regions
15. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.
Electron
CMB
Light-Year
Halo
16. 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.
open star clusters
terrestrial planet
Sidereal Day
cosmology
17. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)
matter dominated universe
quarks
greatest elongation
Spectroscopic parallax
18. A faint - remarkably uniform distribution of radiation in space
Big Crunch
Cosmic Microwave Background
Cosmic Microwave Background (CMB)
mass
19. The north-south line passing directly overhead through the zenith.
Meridian
Europa (Jupiters moon)
Primary Mirror
aurora
20. The average distance between the Earth and the Sun (=1.5 x10^8km)
How is winding dilemma solved?
rotation curve=winding dilemma?
planetesimal
Astronomical Unit
21. 1μm 100 nm
Europa (Jupiters moon)
shape and color of ELLIPTICAL galaxies
Electromagnetic Radiation: Visible Light
widmanstatten pattern
22. The point in its orbit where a planet is farthest from the sun
Parsec
aphelion
Thermal Equilibrium
reflection star clusters
23. The 'edge' of the universe. Light beyond this has not reached us yet.
Granules
Observations of distant type Ia supernovae indicate that the expansion of the universe is speeding up with time - not slowing down! So there must be a force causing this.
partile horizon
Chromosphere
24. Europa
MOONS: roundest shape
Winter Solstice
Dwarf planets
Kirchhoff's Law
25. What are the three possible geometries of the universe?
Open - flat - and closed.
molecular clouds
Eyepiece Lens
quasar
26. A galaxy emitting large amounts of energy at long wavelengths.
Colestial Pole
radio galaxy
Geocentric
density
27. Matter that reveals itself only through its gravitational attraction.
Galilean satellite
era of recombination
chondrite
dark matter
28. A quantity measuring the stability of the Earth's atmosphere
Quasar
Make up of the jovian planets
Seeing
widmanstatten pattern
29. Radiation given off by electrons accelerating in a magnetic field
CMB
rotation curve = dark matter?
radiation dominated universe
Synchrotron Rotation
30. The entity responsible for spiral arms in grand-design spiral galaxies
plate tectonics
nucleus
Density Wave
Plank's Law
31. The apparent magnitude a star would have if it were at a distance of 10 parsecs.
Dark Matter
supernova
Absolute Magnitude
Planetary Nebula
32. Half of the longest diameter across an ellipse
Primary Mirror
semimajor axis
SETI
Plank's Law
33. The oldest terrain on the moon
highlands
Zenith
Magnification
accretion disk
34. Mercury
Filament
We don't know. It might be but does not have to be.
smallest diameter
standard candle
35. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc
Neutron Star
smallest diameter
critical density
If it is in a denser medium - such as glass - it will move slower
36. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.
CMB
shape and color of SPIRAL galaxies
Jovian Planets
Main Sequence
37. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.
general star population
supernova
3 reasons we orbit satellites to observe universe
Ground State
38. Matter so dense that even light cannot escape its gravity
Pulsar
nucleus
Light-Year
Black Hole
39. The law that predicts the possible types of spectra.
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40. The location of a supermassive black hole
Active Optics
Nucleus
Thermonuclear Fusion
Emission Spectrum
41. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.
Trojan asteroids
Doppler Shift
difference between maria and highlands of the moon.
Precession
42. A particle of light.
Rich vs poor clusters
Objective Lens
meteor shower
Photon
43. A plot of star absolute magnitude verses spectral type.
Ground State
H-are Diagram
The Local Group
belt
44. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)
greatest elongation
Light Gathering Power
rotation curve=winding dilemma?
Turn off Point
45. What causes the zones and belts on jupiter and saturn?
accretion disk
differential rotation
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
Main Sequence
46. A collection of galaxies like the one the Milky Way belongs to
Asymptotic giant Branch Star
Occam's razor
Poor Cluster
Corona
47. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula
Supercluster
Sunspots
Flat - Flat
reflection star clusters
48. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.
Dwarf planets
conjunction
self-propagating star formation
accretion disk
49. 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.
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
asteroid
density parameter
cosmological principle
50. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)
homogeneous
Summer Solstice
Hubble law
blazar