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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 point directly overhead.
terrestrial planet
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.
Dark Nebula
Zenith
2. The process of acquiring material
accretion
Extrasolar Planet
synchrotron radiation
meteoriod
3. The gap inthe outer portion of Saturn's A ring
era of recombination
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
cosmic fireball
Enke gap
4. The lens in a telescope used to determine the magnification
great red spot
A family of radiant energy- includes light
Eyepiece Lens
Flare
5. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)
density parameter
jovian
rotation curve=winding dilemma?
cosmic singularity
6. Hydrogen and helium (mainly)
Flat - Remain Parallel - Exactly 1
Seyfert galaxy
Make up of the jovian planets
slowest rotation
7. A term referring to Jupiter-like planets
asteroid
jovian
Ole Roemer
MOONS: most geologically active
8. The measure of a variable star's apparent magnitude as it brightens and dims with time
Main Sequence Stars
Lagrangian Razor
Light Curve
direct motion
9. The temp at which a substance in the vacuum of space solidifies
If it is in a denser medium - such as glass - it will move slower
condensation temperature
fusion crust
Particle Horizon
10. The mirror that gathers the light in a reflector
Primary Mirror
fusion crust
rotation curve = dark matter?
direct motion
11. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR
supernova
gravity
quasar
Quasar
12. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.
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13. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.
Sunspots
Annular Eclipse
nova
tectonics of Venus
14. The act of removing an electron from an atom.
comet
Spectroscopic parallax
Ionization
partile horizon
15. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids
Cepheid variables
Planetary Nebula
Europa (Jupiters moon)
Kirkwood gaps
16. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.
MOONS: thickest atmosphere
Jupiters red spot
OB Associations
Cosmological Principle
17. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.
tectonics of Earth
Nucleus
Blackbody Curve
Cassini division
18. Elliptical orbits that come inside orbit of the Earth.
Metals
epicycle
Apollo asteroids
Trojan asteroids
19. A spectrum of light with energy at only a few wavelengths.
widmanstatten pattern
Milky way Galaxy
Emission Spectrum
Galilean satellite
20. 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
CCD
High Velocity Stars
Occam's razor
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
21. When material is heated and moves taking the heat energy with it
Astronomical Unit
E=mc2
Steady State Theory (Leads to Olber's Paradox)
Convection
22. The part of the Milky way that has on-going star formation
gravity
Disk
Rich Cluster
Degeneracy
23. 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
H2 Regions
reflection star clusters
tectonics of Venus
Resolving Power
24. The material from which the solar system formed
Parallax
solar nebula
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
Kirchhoff's Law
25. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core
Asymptotic giant Branch Star
Ecliptic
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Synodic Day
26. The powdered stone fragments that make up the lunar 'soil'
slowest rotation
regolith
radiation pressure
shape and color of ELLIPTICAL galaxies
27. Neptune or uranus
Plank's Law
inferior planets
Coldest surface
tectonics of Earth
28. The shadow area behind the Earth or Moon where the Sun is completely obscured.
Population 1 vs Population 2 stars
Dark matter candidates
Umbra
Electromagnetic Radiation: Radio
29. Radiation given off by electrons accelerating in a magnetic field
planetesimal
Main Sequence
Synchrotron Rotation
Zenith
30. 10 nm 10^2 nm
meteoriod
Electromagnetic Radiation: Visible Light
asteroid
Electromagnetic Radiation: X-Ray
31. Europa
Kuiper belt
MOONS: roundest shape
accretion disk
shape and color of ELLIPTICAL galaxies
32. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker
Celestial Sphere
Photosphere
Yes - frozen at the poles- remains protected from the suns rays
Seyfert galaxy
33. How is the Hubble Law consistent with an expanding universe?
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.
Pulsar
Metals
nova
34. The distance between a lens and its focal plane
Degeneracy
Focal Length
Autumnal Equinox
shape and color of SPIRAL galaxies
35. A long-lived high-pressure bulge in Jupiter's southern hemisphere
chondrite
Shepherd satellite
Poor Cluster
great red spot
36. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes
Thermonuclear Fusion
300000 KM/sec
accretion
Quasar
37. A measure of the force of gravity on an object
most moons
Hubble law
weight
slowest rotation
38. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction
Cosmological Principle
Make up of the terrestrial planets
Gravitational Lens
interstellar dust
39. The organization of clusters of galaxies into sheets and strings
Cosmological Principle
quasar
Globular Cluster
Supercluster
40. Jupiter
most moons
Asymptotic giant Branch Star
Disk
Hydrostatic Equilibrium
41. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)
radio galaxy
Colestial Pole
White Dwarf
Dark matter candidates
42. Mercury and venus
fewest moons
Big Bang
Instability strip
Eyepiece Lens
43. When one side of a body always faces the planet it revolves around
Red Giant Branch Star
Plank's Law
weight
synchronous rotation
44. Mercury
SETI
smallest diameter
evidence of water on mars
cosmic fireball
45. A small round distribution of gas surrounding a dying star
synchrotron radiation
bulge
CCD
Planetary Nebula
46. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)
nucleus
Thickest atmosphere
Doppler Shift
Oort cloud
47. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)
Coldest surface
planetary nebula
Parsec
era of recombination
48. The study of the universe as a whole.
Supernova (You can be my supernova girl)
Open Cluster
cosmology
Prominence
49. A quantity measuring the stability of the Earth's atmosphere
Coronal Loop
Seeing
inferior planets
Electromagnetic Radiation: Microwave
50. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)
most moons
planetary nebula
Electron
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.
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