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Test your basic knowledge |
Cosmology
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Study First
Subject
:
science
Instructions:
Answer 50 questions in 15 minutes.
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study here
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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. Long - meandering cliff formed when a planet surface cools and shrinks
scarp
bulge
jovian
nova
2. A continuous spectrum of light missing energy at a few wave lengths.
CMB
Absorption Spectrum
Main Sequence
Differential Rotation
3. Why does the earth have few craters while the moon has many?
Gamma ray bursts
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Galilean satellite
4. Heavier elements such as iron - silicon - magnesium - sulfer - nickel
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
Jupiters red spot
Light Curve
Make up of the terrestrial planets
5. The equation that describes how matter equates with energy
Shepherd satellite
E=mc2
gravity
direct motion
6. Jupiter
deferent
Kirchhoff's Law
most moons
Yes - frozen at the poles- remains protected from the suns rays
7. A quantity measuring the stability of the Earth's atmosphere
Open Cluster
Chandrasekhar Limit
Seeing
Parallax
8. A star without enough mass to begin hydrogen fusion
molecular clouds
Brown dwarf
radiation pressure
CCD
9. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.
radio galaxy
fewest moons
Grand design spirals
Flat - Flat
10. The distance between a lens and its focal plane
Black Hole
Granules
Focal Length
Hubble constant
11. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.
Absorption Spectrum
Void
3 reasons we orbit satellites to observe universe
retrograde motion
12. A high-pressure bulge in Neptune's southern hemisphere
Electromagnetic Radiation: Visible Light
Astronomical Unit
great dark spots
cosmic singularity
13. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE
Celestial Sphere
Jupiters red spot
MOONS: thickest atmosphere
Ganymede (Jupiter)
14. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids
Terrestrial Planets
Kirkwood gaps
Blackbody Curve
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
15. The distance a moon can be from a planet before shattering from tidal forces
roche limit
Focal Length
cosmic singularity
Colestial Pole
16. What do we think the actual fate of the universe will be and why do we think this?
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.
Annular Eclipse
Density Wave
general star population
17. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
High Velocity Stars
tectonics of Mars
Positive - Converge - Greater than 1
Cassegrain Focus
18. The gap inthe outer portion of Saturn's A ring
epicycle
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.
Plague
Enke gap
19. The process of acquiring material
resonance
MOONS: larger than mercury
accretion
Jovian Planets
20. Any change in the speed or direction of an object's motion
meteorite
protostar
SETI
acceleration
21. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
Plank's Law
Emission Spectrum
Flat - Remain Parallel - Exactly 1
Electromagnetic Radiation: Infrared
22. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker
Steady State Theory (Leads to Olber's Paradox)
Lagrangian Razor
Turn off Point
Seyfert galaxy
23. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies
cosmic singularity
Hubble constant
Kirkwood gaps
Nebula
24. An object that may remain after a star explodes
Terrestrial Planets
Neutron Star
Blackbody Curve
Magnification
25. Poitns of gravitational stability in the orbit of a planet
Disk
Electromagnetic Radiation
Dark matter is located at center of clusters - pulling the cluster members into faster orbits--dark matter gravity keeps objects in galxies bound.
Lagrangian Razor
26. The entity from which the whole universe is postulated to have come from.
cosmic singularity
Grand design spirals
Magnification
Olber's paradox
27. A large and bright but cool star.
Gamma-ray Burst
Neutron Star
Rich vs poor clusters
Red Giant
28. The rate of expansion of the universe.
Parallax
synchrotron radiation
Hubble constant
Cosmological Principle
29. A distance measure determined by the shifting of a star against the background sky every 6 months.
Galilean satellite
Parsec
Triple Alpha rocess
force
30. An energetic event taking place in the early universe
evidence of water on mars
hottest surface
shape and color of ELLIPTICAL galaxies
Gamma-ray Burst
31. The rotation period of the Earth measured relative to the Sun.
Electromagnetic Radiation: Visible Light
tectonics of Earth
Grand design spirals
Synodic Day
32. The mirror that gathers the light in a reflector
Winter Solstice
Primary Mirror
Electron
Photometry
33. An important quality of telescopes that increases as the square of the primary mirror or objective lens
Light Gathering Power
Continuous Spectrum
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.
Interstellar Extinction
34. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object
accretion disk
Differential Rotation
chemical differentiation
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.
35. Ganymede and Titan
tectonics of Venus
MOONS: larger than mercury
accretion
aurora
36. Then the Sun moves from north to south across the celestial equator (about September 23)
Autumnal Equinox
Celestial Equator
aphelion
least dense
37. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere
Active Optics
Hydrostatic Equilibrium
cosmic singularity
Plague
38. Saturn
Hubble constant
least dense
Poor Cluster
Filament
39. The equation that describes how matter equates with energy
Ground State
Refractor
Dwarf planets
E=mc2
40. The name for the only seriously considered theory of the universe.
Big Bang
Apparent Magnitude
slowest rotation
Nova
41. A repeated - periodic push or pull capable of summing into a larger push or pull
quarks
resonance
Atomic Number
retrograde motion
42. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation
disk
MOONS: roundest shape
nova
chemical differentiation
43. A star that erratically and explosively brightens and dims
Light-Year
Nova
Turn off Point
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
44. The fusion process that turns three helium nuclei into a carbon nucleus
Most dense
self-propagating star formation
Colestial Pole
Triple Alpha rocess
45. Centered on the sun.
Filament
Heliocentric
contrast northern lowlands and the southern highlands of mars...
partile horizon
46. A crystalline patter found in iron meteorites
cosmological principle
Superior planets
widmanstatten pattern
jovian
47. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
hottest surface
solar nebula
Hipparchus
Positive - Converge - Greater than 1
48. The oldest part of the Milky Way
quasar
asteroid
Halo
Electron
49. A term referring to Jupiter-like planets
Dark Nebula
jovian
Differential Rotation
Electron
50. Venus
gravity
Poor Cluster
Spectroscopic Parallax
Roundest orbit
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