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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. Half of the longest diameter across an ellipse
era of recombination
semimajor axis
High Velocity Stars
Halo
2. The point in its orbit where a planet is farthest from the sun
Quasar
tectonics of Venus
Neutron Star
aphelion
3. A word meaning 'the same in all directions.'
jovian
isotropic
Coronal Loop
radiation pressure
4. Venus
Supernova (You can be my supernova girl)
Globular Cluster
Roundest orbit
Supernova (You can be my supernova girl)
5. Matter that reveals itself only through its gravitational attraction.
highlands
dark matter
Black Hole
Ganymede (Jupiter)
6. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites
Dwarf planets
Apparent Magnitude
Red Giant
MOONS: largest size
7. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density
Ganymede (Jupiter)
tectonics of Earth
Interstellar Extinction
density parameter
8. The entity from which the whole universe is postulated to have come from.
Emission Spectrum
superclusters
Galilean satellite
cosmic singularity
9. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant
Planetary Nebula
Cosmic Microwave Background (CMB)
fastest rotation
Thermal Equilibrium
10. 1μm 100 nm
Cassini division
radio lobe
Electromagnetic Radiation: Visible Light
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
11. A star that is in the process of forming. It glows from gravitational contraction
Emission Spectrum
Resolving Power
protostar
direct motion
12. The science of measuring light energy by wavelength.
Spectroscopy
Hydrostatic Equilibrium
Plague
Celestial Equator
13. A representation of the changes in color and brightness of an evolving protostar.
protostar
Largest diameter
Hyashi track
Astronomical Unit
14. The crust of a meteorite caused by its entry into Earth's atmosphere
Make up of the terrestrial planets
fusion crust
Meridian
partile horizon
15. What are the three possible geometries of the universe?
Electromagnetic Radiation: Radio
matter dominated universe
Open - flat - and closed.
jovian
16. A term referring to Jupiter-like planets
aurora
Metals
critical density
jovian
17. 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.
Penumbra
Seeing
Annular Eclipse
Population 1 vs Population 2 stars
18. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas
HII Region
solar nebula
Cosmological Principle
chondrite
19. The rotation of a star or planet at different speeds at its equator and poles
Wein's Law
Ecliptic
greatest elongation
differential rotation
20. A telescope that uses mirrors to focus light
Spectroscopic Parallax
Color Index
Cosmological Principle
Reflector
21. A small and dim but hot star.
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.
critical density
Thickest atmosphere
White Dwarf
22. The process similar to conduction by which energy moves from the solar core to the convective layer
Radiative Diffusion
Red Giant Branch Star
Steady State Theory (Leads to Olber's Paradox)
Dark Nebula
23. The name for the only seriously considered theory of the universe.
Void
widmanstatten pattern
Big Bang
Active Optics
24. Earth
Rich Cluster
Most dense
E=mc2
Electromagnetic Radiation
25. 100 nm 10 nm
Zenith
Electromagnetic Radiation: Ultraviolet Light
Shepherd satellite
Umbra
26. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.
Hydrostatic Equilibrium
semimajor axis
Ionization
partile horizon
27. A small spherical dark nebula
Jovian Planets
Bok Globule
Thermonuclear Fusion
Celestial Sphere
28. 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
thinnest atmosphere
gravity
Jovian Planets
Spectroscopic parallax
29. A small chunk of rock in space
Trojan asteroids
Thickest atmosphere
meteoriod
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
30. The rock that makes up the lunar maria
Electromagnetic Radiation: Infrared
Electromagnetic Radiation
mare basalt
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
31. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas
density waves
Convection
Coronal Loop
Dark Nebula
32. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker
Superior planets
inferior planets
Seyfert galaxy
Blackbody
33. The distance light travels in one year (=9.46x10^12km).
supermassive black hole
Electromagnetic Radiation: Visible Light
Atomic Number
Light-Year
34. The mass of an object divided by its volume
AGN
Chandrasekhar Limit
The Big Bang Theory resolves Olber's Paradox
density
35. Light scattered through the atmosphere that degrades astronomical images
Light Pollution
Self-Propogating Star Formation
zone
comet
36. When the Sun is farthest south of the celestial equator (About December 22)
matter dominated universe
reflection star clusters
Winter Solstice
rotation curve=winding dilemma?
37. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation
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.
AGN
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.
Degeneracy
38. Jupiter - Saturn - Uranus - Neptune
Parsec
Spectroscopic parallax
Celestial Equator
Jovian Planets
39. When material is heated and moves taking the heat energy with it
H2 Regions
Electromagnetic Radiation: Microwave
Convection
Supernova (You can be my supernova girl)
40. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)
Europa (Jupiters moon)
planetesimal
opposition
weight
41. 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
White Dwarf
Particle Horizon
reflection star clusters
Globular Cluster
42. A telescope that uses lenses to focus light
Refractor
Winter Solstice
Absolute Magnitude
Energy Level
43. The process responsible for creating the arms of flocculent spiral galaxies
semimajor axis
Self-Propogating Star Formation
Electromagnetic Radiation
chondrite
44. When the Sun moves from south to north across the celestial equator (about March 21)
Flat - Flat
AGN
mass
Vernal Equinox
45. Any class of objects with a uniform luminosity used to determine distance.
deferent
Chandrasekhar Limit
standard candle
Terrestrial Planets
46. Comglomerates of ice and rock that orbit the sun in highly elliptical paths
interstellar dust
Halo
Pixel
comet
47. An empirical scheme for predictin ghe orbital distances of planets
Molecular Clouds
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.
Cassini division
Titus-Bode Law
48. A bright area of higher temperature that often proceeds the formation of sunspots.
Plague
Cassini division
Terrestrial Planets
cosmic singularity
49. A quantity measuring the stability of the Earth's atmosphere
Rich vs poor clusters
Main Sequence Stars
Seeing
Jupiters red spot
50. The slow wobble of the Earth on its rotation axis.
accretion disk
Electromagnetic Radiation: Infrared
Precession
300000 KM/sec