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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 nuclei of very distant galaxies. Likely a manifestation of supermassive black holes
Galilean satellite
Quasar
bulge
planetary nebula
2. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density
density parameter
jovian
greatest elongation
era of recombination
3. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)
cosmological principle
Cosmic Microwave Background
tectonics of Venus
SETI
4. The oldest grouping of stars - found in the galaxy halo
Electromagnetic Radiation: Ultraviolet Light
nucleus
Globular Cluster
Degeneracy
5. The science of measuring the apparent magnitudes of stars by imaging them through different filters.
Horizontal Branch Star
Gravitational Lens
great red spot
Photometry
6. What Ole Roemer used to measure the speed of light in a vacuum
condensation temperature
Eclipses of the Moons of Jupiter
deferent
Enke gap
7. When the Sun is farthest north of the celestial equator (about June 22)
Horizontal Branch Star
CNO Cycle
Summer Solstice
Electromagnetic Radiation: Visible Light
8. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting
Jovian Planets
Big Crunch
Hubble constant
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.
9. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder
partile horizon
Triple Alpha rocess
shape and color of ELLIPTICAL galaxies
critical density
10. The dimming of starlight by intervening dust
Autumnal Equinox
Continuous Spectrum
Interstellar Extinction
Synodic Day
11. 10 cm -> 1 mm
conjunction
Callisto (Jupiter)
tectonics of Earth
Electromagnetic Radiation: Microwave
12. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto
Kuiper belt
Sb spiral galaxy
Steady State Theory (Leads to Olber's Paradox)
Focal Plane
13. The mirror that gathers the light in a reflector
Primary Mirror
Self-Propogating Star Formation
scarp
Oort cloud
14. A push or a pull
Cassini division
force
Atomic Number
Turn off Point
15. An energetic event taking place in the early universe
Callisto (Jupiter)
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.
Gamma-ray Burst
Eclipses of the Moons of Jupiter
16. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the
Quasar
The Big Bang Theory
radiation dominated universe
cosmology
17. A phenomenon seen when the Earth passes through the orbit of a burned out comet
meteor shower
Blackbody
Coldest surface
Main Sequence
18. A method of finding a star's distance from its absolute magnitude and spectral type or color.
greehouse effects
Apollo asteroids
Spectroscopic Parallax
Drake equation
19. A small chunk of rock in space
Degeneracy
meteoriod
Dwarf planets
CCD
20. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant
Kuiper belt
Thermal Equilibrium
Gamma ray bursts
planetary nebula
21. The first rock-sized bodies that formed in the solar nebula from dust grains
chondrite
High Velocity Stars
deferent
differential rotation
22. A perfect absorber and radiator of electromagnetic radiation.
Blackbody
Asymptotic giant Branch Star
supermassive black hole
Hipparchus
23. Why does the earth have few craters while the moon has many?
critical density
Resolving Power
bulge
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
24. Mercury and venus
Continuous Spectrum
Electromagnetic Radiation: Radio
Sidereal Day
fewest moons
25. The act of removing an electron from an atom.
Light: travels like a wave - detected like a particle
Kuiper belt
Ionization
Gamma-ray Burst
26. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.
self-propagating star formation
Largest diameter
Heliocentric
Negative - Diverge - Less than 1
27. The layer of the sun just above the photosphere
Electromagnetic Radiation: Ultraviolet Light
protostar
Chromosphere
Largest diameter
28. The amount an image is enlarged by a telescope
Population 1 vs Population 2 stars
Celestial Sphere
Terrestrial Planets
Magnification
29. Earth
Make up of the jovian planets
Umbra
Most dense
mapping the structure of Milky Way disk
30. Small moons that maintain the shape of rings around Saturn and Uranus
Shepherd satellite
fastest rotation
Population 1 vs Population 2 stars
Electromagnetic Radiation: Gamma Ray
31. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.
Hipparchus
Celestial Sphere
dark matter
greehouse effects
32. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.
Negative - Diverge - Less than 1
Asymptotic giant Branch Star
Chandrasekhar Limit
Seyfert galaxy
33. A push or a pull
We don't know. It might be but does not have to be.
The Big Bang Theory
gravity
force
34. The rotation period of the Earth measured relative to the stars.
gravity
Nucleus
Sidereal Day
Doppler Shift
35. A planet that is farther from the sun than the Earth is
Plank's Law
Spectral Lines
cosmic singularity
Superior planets
36. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE
MOONS: larger than mercury
Ganymede (Jupiter)
radiation dominated universe
Ground State
37. An evolved star - past the helium flash that is burning helium to carbon in it's cores
Horizontal Branch Star
radio galaxy
Ground State
Photon
38. Heavier elements such as iron - silicon - magnesium - sulfer - nickel
HII Region
Make up of the terrestrial planets
Europa (Jupiters moon)
Chandrasekhar Limit
39. A logarithmically scaled value for the measured brightness of a star.
Apparent Magnitude
great red spot
Maria
Resolving Power
40. The larger bodies that formed early in teh solar nebula that were chemically differentiated
Largest diameter
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.
planetesimal
Photometry
41. Ganymede and Titan
Dark Matter
MOONS: larger than mercury
Shepherd satellite
Hyashi track
42. A star without enough mass to begin hydrogen fusion
mare basalt
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Black Hole
Brown dwarf
43. 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)
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.
Objective Lens
quasar
Dark Matter
44. The force of attraction between any two objects having mass
fusion crust
Electromagnetic Radiation: Gamma Ray
Rich vs poor clusters
gravity
45. 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.
molecular clouds
mapping the structure of Milky Way disk
Sidereal Day
Coldest surface
46. Mercury and venus
Reflector
fewest moons
Pixel
Autumnal Equinox
47. An element of a highly efficient - two-dimensional electronic light detector
Open - flat - and closed.
Ole Roemer
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Pixel
48. The process similar to conduction by which energy moves from the solar core to the convective layer
opposition
Radiative Diffusion
evidence of water on mars
Kuiper belt
49. Where is the center of the expansion
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.
Secondary Mirror
Electromagnetic Radiation: Radio
OB Associations
50. The part of the Milky way that has on-going star formation
Disk
Plague
Open - flat - and closed.
accretion disk
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