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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. Poitns of gravitational stability in the orbit of a planet
mapping the structure of Milky Way disk
Penumbra
Atomic Number
Lagrangian Razor
2. A word meaning 'the same everywhere throughout.'
Red Giant
greatest elongation
Open - flat - and closed.
homogeneous
3. The high- temperatature outer layer of the sun
Corona
blazar
mass
Absorption Spectrum
4. The distance between a lens and its focal plane
Focal Length
Energy Level
Open - flat - and closed.
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
5. Mercury - Venus - Earth - Mars
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Terrestrial Planets
Trojan asteroids
Jovian Planets
6. A rock or iron specimen that has fallen from space
meteorite
Drake equation
Cepheid variables
radio galaxy
7. Milky way galaxy is a member - a small poor cluster-about 30 galaxies
Coronal Loop
self-propagating star formation
The Local Group
Doppler Shift
8. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)
Jovian Planets
Light: travels like a wave - detected like a particle
rotation curve=winding dilemma?
Electromagnetic Radiation: Radio
9. What Ole Roemer used to measure the speed of light in a vacuum
Eclipses of the Moons of Jupiter
Planck time
Objective Lens
Dwarf planets
10. The rotation period of the Earth measured relative to the Sun.
Parallax
Thermonuclear Fusion
Dark Matter
Synodic Day
11. 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.
Particle Horizon
Asymptotic giant Branch Star
reflection star clusters
open star clusters
12. The average distance between the Earth and the Sun (=1.5 x10^8km)
Astronomical Unit
comet
Active Optics
Jovian Planets
13. A measure of the ability of a telescope to see fine detail
Zenith
Perihelion
Summer Solstice
Resolving Power
14. A star that blows itself apart
Gamma ray bursts
Supernova (You can be my supernova girl)
Liquid metallic hydrogen
Milky way Galaxy
15. A two-filter measure of the color - and hence temperature - of a star.
tectonics of Mars
plate tectonics
Color Index
aurora
16. IO
Emission Spectrum
Halo
Refractor
MOONS: most geologically active
17. The powdered stone fragments that make up the lunar 'soil'
mare basalt
Rich Cluster
rotation curve=winding dilemma?
regolith
18. Centered on the sun.
least dense
dark matter
Heliocentric
Population 1 vs Population 2 stars
19. A point in the sky where meteors appear to come from during a shower
Supernova (You can be my supernova girl)
Nova
radiant
The Big Bang Theory resolves Olber's Paradox
20. The surface of the sun
Photosphere
Vernal Equinox
Ground State
Main Sequence Stars
21. The first rock-sized bodies that formed in the solar nebula from dust grains
MOONS: larger than mercury
chondrite
Electromagnetic Radiation: Ultraviolet Light
Limb darkening
22. VENUS
Chromosphere
Open - flat - and closed.
synchrotron radiation
Clouds of sufuric acid (very inhospitable and brightest object in the sky) - process called greenhouse affect traps radiation making it 900 degrees at times - spins with retrograde rotation (sun rises in west) and takes 58.4 days for it to set. Thick
23. Ganymede
Refractor
MOONS: largest size
Objective Lens
Light: travels like a wave - detected like a particle
24. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast
supermassive black hole
Hipparchus
High Velocity Stars
supernova
25. A galaxy sending out a stream of material from its nucleus
slowest rotation
Radio Galaxy
Sa spiral galaxy
tectonics of Venus
26. All wavelengths of light emitted by a blackbody.
contrast northern lowlands and the southern highlands of mars...
Globular Cluster
Chandrasekhar Limit
Blackbody Curve
27. A telescope that uses lenses to focus light
Cosmological Principle
Autumnal Equinox
Ammonia - methane - and water
Refractor
28. A planet that is closer to the sun than the earth
inferior planets
SETI
Cosmic Microwave Background (CMB)
jovian
29. Dark areas on the sun that are cooler than the surrounding photosphere
Sunspots
interstellar dust
Pulsar
Plank's Law
30. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.
most eccentric orbit
CCD
greehouse effects
AGN
31. An object that may remain after a star explodes
Light Gathering Power
Neutron Star
Open - flat - and closed.
300000 KM/sec
32. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast
Olber's paradox
Ionization
High Velocity Stars
Celestial Equator
33. The family of radiant energy that includes light as a subset
Cosmic Microwave Background (CMB)
Active Optics
Electromagnetic Radiation
Heliocentric
34. When one side of a body always faces the planet it revolves around
MOONS: most geologically active
Thermonuclear Fusion
synchronous rotation
cosmic fireball
35. The rate of expansion of the universe.
epicycle
Hubble constant
Lagrangian Razor
bulge
36. Ganymede and Titan
Radiative Diffusion
MOONS: larger than mercury
asteroid
widmanstatten pattern
37. Poitns of gravitational stability in the orbit of a planet
Lagrangian Razor
cosmological red shift
CCD
How is winding dilemma solved?
38. Mercury
Roundest orbit
mass
Gravitational Lens
most eccentric orbit
39. A planet that is closer to the sun than the earth
Winter Solstice
Interstellar Extinction
Seyfert galaxy
inferior planets
40. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE
zone
Europa (Jupiters moon)
contrast northern lowlands and the southern highlands of mars...
Color Index
41. The elementary building blocks from which protons and neutrons are formed.
Cassegrain Focus
meteor shower
quarks
Spectroscopic parallax
42. 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.
density waves
Turn off Point
Enke gap
Hydrostatic Equilibrium
43. The crust of a meteorite caused by its entry into Earth's atmosphere
Focal Plane
Flat - Remain Parallel - Exactly 1
cosmology
fusion crust
44. The process responsible for creating the arms of flocculent spiral galaxies
Self-Propogating Star Formation
Inverse Square Law
Milky way Galaxy
Open Cluster
45. Why does the earth have few craters while the moon has many?
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Main Sequence
Photosphere
difference between maria and highlands of the moon.
46. A particle of light.
Photon
aphelion
Astronomical Unit
jovian
47. An energetic event taking place in the early universe
Interstellar Extinction
fusion crust
general star population
Gamma-ray Burst
48. A planet that is farther from the sun than the Earth is
Superior planets
Spectroscopy
Nebula
Bulge
49. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.
Cassegrain Focus
Io (jupiters moon)
Thickest atmosphere
Flat - Flat
50. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.
Turn off Point
Olber's paradox
Shepherd satellite
shape and color of ELLIPTICAL galaxies