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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. 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
Spectroscopic parallax
Io (jupiters moon)
Coronal Loop
Refractor
2. The movement of the Earth's crustal plates riding on top of the mantle.
chemical differentiation
Globular Cluster
plate tectonics
Pulsar
3. The process of acquiring material
Absolute Magnitude
terrestrial planet
accretion
roche limit
4. The science of measuring light energy by wavelength.
Poor Cluster
Hubble constant
Roundest orbit
Spectroscopy
5. The force of attraction between any two objects having mass
Electromagnetic Radiation: Radio
dark matter
gravity
least dense
6. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)
Electromagnetic Radiation: Infrared
Spectral Lines
Olber's paradox
SETI
7. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)
semimajor axis
Energy Level
Positive - Converge - Greater than 1
blazar
8. Small moons that maintain the shape of rings around Saturn and Uranus
Filament
Differential Rotation
SETI
Shepherd satellite
9. An empirical scheme for predictin ghe orbital distances of planets
Titus-Bode Law
Occam's razor
Halo
Light Gathering Power
10. The first rock-sized bodies that formed in the solar nebula from dust grains
chondrite
Black Hole
weight
widmanstatten pattern
11. When one side of a body always faces the planet it revolves around
Active Optics
synchronous rotation
plate tectonics
Coldest surface
12. The equation that describes how matter equates with energy
Apparent Magnitude
Light Curve
slowest rotation
E=mc2
13. Long - meandering cliff formed when a planet surface cools and shrinks
Ganymede (Jupiter)
scarp
Dark Matter
Liquid metallic hydrogen
14. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.
Red Giant Branch Star
Blackbody Curve
Particle Horizon
Cassini division
15. Mercury
coma
most eccentric orbit
The Big Bang Theory
conjunction
16. A star that erratically and explosively brightens and dims
Apparent Magnitude
Nova
Extrasolar Planet
Blackbody
17. The distance light travels in one year (=9.46x10^12km).
Light Curve
Light-Year
chemical differentiation
radiation pressure
18. A location on an H-are Diagram where evolving stars pulsate
Celestial Sphere
Hydrostatic Equilibrium
High Velocity Stars
Instability strip
19. The 'edge' of the universe. Light beyond this has not reached us yet.
Radiative Diffusion
Radio Galaxy
partile horizon
OB Associations
20. The sinking of denser elements to the center of a young molten planet
fewest moons
chemical differentiation
The Big Bang Theory
Objective Lens
21. 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.
Self-Propogating Star Formation
Ecliptic
Oort Cloud
most moons
22. When the Sun moves from south to north across the celestial equator (about March 21)
Annular Eclipse
Rich Cluster
greehouse effects
Vernal Equinox
23. The measure of a variable star's apparent magnitude as it brightens and dims with time
Light Curve
Grand design spirals
Electromagnetic Radiation
If it is in a denser medium - such as glass - it will move slower
24. The source of the force that is accelerating the expansion rate of the universe.
radio lobe
Granules
Planck time
dark energy
25. The dimming of starlight by intervening dust
Disk
Interstellar Extinction
Supernova (You can be my supernova girl)
Stephen-Boltzman Law
26. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes
Quasar
Molecular Clouds
meteorite
Oort cloud
27. How did Earth come to have an oxygen rich atmosphere?
condensation temperature
Plague
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.
radiant
28. A continuous spectrum of light missing energy at a few wave lengths.
Absorption Spectrum
mass
Doppler Shift
Oort cloud
29. A galaxy emitting large amounts of energy at long wavelengths.
Focal Plane
contrast northern lowlands and the southern highlands of mars...
standard candle
radio galaxy
30. The elementary building blocks from which protons and neutrons are formed.
AGN
Degeneracy
quarks
If it is in a denser medium - such as glass - it will move slower
31. Jupiter - Saturn - Uranus - Neptune
Jovian Planets
Differential Rotation
Hydrostatic Equilibrium
cosmic singularity
32. Mercury - Venus - Earth - Mars
Emission Spectrum
MOONS: larger than mercury
Light Gathering Power
Terrestrial Planets
33. Electromagnetic Radiation
Neutron Star
Radio Galaxy
evidence of water on mars
A family of radiant energy- includes light
34. The first rock-sized bodies that formed in the solar nebula from dust grains
Cassini division
widmanstatten pattern
rotation curve = dark matter?
chondrite
35. The oldest grouping of stars - found in the galaxy halo
critical density
Apparent Magnitude
Globular Cluster
Density Wave
36. The process that powers the sun and hydrogen bombs
Ganymede (Jupiter)
density parameter
Thermonuclear Fusion
Photosphere
37. 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.
Terrestrial Planets
Cosmological Principle
Secondary Mirror
Sidereal Day
38. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas
Dark Nebula
Photometry
belt
Summer Solstice
39. 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
direct motion
Blackbody Curve
Spectroscopic parallax
MOONS: most geologically active
40. A crystalline patter found in iron meteorites
Spectroscopic Parallax
widmanstatten pattern
HII Region
Radiative Diffusion
41. The imaginary sphere centered on the Earth that hols the stars.
Celestial Sphere
accretion
Halo
Make up of the terrestrial planets
42. 10 cm -> 1 mm
reflection star clusters
mare basalt
Hyashi track
Electromagnetic Radiation: Microwave
43. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas
differential rotation
Autumnal Equinox
HII Region
Rich vs poor clusters
44. Why does the earth have few craters while the moon has many?
Sb spiral galaxy
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Bulge
cosmological principle
45. A collection of galaxies like the one the Milky Way belongs to
Poor Cluster
Celestial Sphere
Particle Horizon
Drake equation
46. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.
Apparent Magnitude
evidence of water on mars
opposition
Halo
47. The light produced when particles from the sun collide with atmospheric molecules
aurora
belt
terrestrial planet
Blackbody
48. Form honeycomb like patterns surrounding empty or nearly empty voids.
Objective Lens
Spectroscopic parallax
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
superclusters
49. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density
Cosmic Microwave Background
density parameter
Coldest surface
Magnification
50. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)
Big Crunch
supernova
quasar
mare basalt
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