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Test your basic knowledge |
Cosmology
Start Test
Study First
Subject
:
science
Instructions:
Answer 50 questions in 15 minutes.
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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. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction
Kuiper belt
interstellar dust
tectonics of Venus
Meridian
2. A logarithmically scaled value for the measured brightness of a star.
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.
Apparent Magnitude
cosmology
Light: travels like a wave - detected like a particle
3. The process responsible for creating the arms of flocculent spiral galaxies
Self-Propogating Star Formation
Planetary Nebula
HII Region
Chromosphere
4. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)
SETI
Radio Galaxy
Ionization
terrestrial planet
5. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.
Spectral Lines
inferior planets
Gamma ray bursts
3 reasons we orbit satellites to observe universe
6. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies
Largest diameter
Nebula
Apollo asteroids
radiation dominated universe
7. 10 nm 10^2 nm
Milky way Galaxy
MOONS: largest size
Plank's Law
Electromagnetic Radiation: X-Ray
8. Form honeycomb like patterns surrounding empty or nearly empty voids.
scarp
Dark Nebula
Metals
superclusters
9. 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 _____.
Kuiper belt
Most dense
White Dwarf
Flat - Remain Parallel - Exactly 1
10. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy
cosmology
Sb spiral galaxy
solar nebula
Electromagnetic Radiation: Radio
11. An entity that is likely in the nucleus of most - if not all - galaxies.
matter dominated universe
supermassive black hole
Occam's razor
direct motion
12. The measure of a variable star's apparent magnitude as it brightens and dims with time
asteroid
Light Curve
radiation dominated universe
Continuous Spectrum
13. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use
Maria
If it is in a denser medium - such as glass - it will move slower
open star clusters
Hubble law
14. The part of the Milky way that has on-going star formation
Disk
Asymptotic giant Branch Star
supermassive black hole
Jovian Planets
15. The gap inthe outer portion of Saturn's A ring
gravity
shape and color of ELLIPTICAL galaxies
Enke gap
The Big Bang Theory
16. The organization of clusters of galaxies into sheets and strings
Vernal Equinox
Supercluster
Kuiper belt
Big Crunch
17. The gap etween saturn's A and B rings
Cassini division
radio lobe
Sidereal Day
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
18. A long-lived high-pressure bulge in Jupiter's southern hemisphere
widmanstatten pattern
cosmological red shift
great red spot
Seyfert galaxy
19. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)
Main Sequence Stars
Oort cloud
Most dense
Annular Eclipse
20. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig
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21. Electromagnetic Radiation
A family of radiant energy- includes light
Plague
Disk
MOONS: thickest atmosphere
22. The projection of the Earth's equator onto the celestial sphere.
A family of radiant energy- includes light
zone
Celestial Equator
Cassegrain Focus
23. Centered on the Earth
jovian
Geocentric
Thickest atmosphere
Ionization
24. The point in its orbit where a planet is farthest from the sun
aphelion
Inverse Square Law
Turn off Point
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.
25. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.
Drake equation
Coronal Loop
Total Eclipse
Cosmological Principle
26. Large nebula consisting of very cold gas and dust
Molecular Clouds
plate tectonics
shape and color of ELLIPTICAL galaxies
Make up of the jovian planets
27. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.
Precession
Meridian
density waves
Blackbody
28. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.
Oort Cloud
Convection
Kuiper belt
Electromagnetic Radiation
29. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation
Parsec
Celestial Equator
Kuiper belt
AGN
30. Europa
MOONS: roundest shape
Cosmological Principle
Geocentric
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.
31. The powdered stone fragments that make up the lunar 'soil'
regolith
terrestrial planet
Red Giant
Flat - Flat
32. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder
Eyepiece Lens
planetesimal
shape and color of ELLIPTICAL galaxies
Shepherd satellite
33. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder
shape and color of ELLIPTICAL galaxies
zone
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.
Chromosphere
34. 10^2 nm 10^7 nm
Energy Level
Spectroscopic Parallax
The Local Group
Electromagnetic Radiation: Gamma Ray
35. The place in the sky that the Earth's axis points toward (can be either north or south)
chemical differentiation
Colestial Pole
nucleus
Sunspots
36. A bright area of higher temperature that often proceeds the formation of sunspots.
Trojan asteroids
Degeneracy
Dark Nebula
Plague
37. The entity responsible for spiral arms in grand-design spiral galaxies
Density Wave
Chandrasekhar Limit
E=mc2
great dark spots
38. Small moons that maintain the shape of rings around Saturn and Uranus
Shepherd satellite
Ganymede (Jupiter)
Energy Level
E=mc2
39. Any class of objects with a uniform luminosity used to determine distance.
Flare
standard candle
Synodic Day
Celestial Equator
40. The law that describes the blackbody curve - and let to quantum mechanics.
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41. A force exerted by reflecting sunlight
Brown dwarf
Neutron Star
radiation pressure
most eccentric orbit
42. A star without enough mass to begin hydrogen fusion
Hydrostatic Equilibrium
Brown dwarf
Shepherd satellite
widmanstatten pattern
43. When the Sun is farthest south of the celestial equator (About December 22)
Winter Solstice
300000 KM/sec
Chromosphere
Make up of the terrestrial planets
44. The Greek philosopher responsible for making the stellar magnitude scale.
Interstellar Extinction
Eclipses of the Moons of Jupiter
Galilean satellite
Hipparchus
45. Venus
hottest surface
Positive - Converge - Greater than 1
difference between maria and highlands of the moon.
Quasar
46. Small moons that maintain the shape of rings around Saturn and Uranus
Shepherd satellite
rotation curve = dark matter?
Particle Horizon
mapping the structure of Milky Way disk
47. The law that predicts the possible types of spectra.
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48. The law that describes the blackbody curve - and let to quantum mechanics.
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49. The name for the only seriously considered theory of the universe.
Big Bang
asteroid
Radiative Diffusion
Liquid metallic hydrogen
50. The science of measuring light energy by wavelength.
Spectroscopy
Autumnal Equinox
Filament
epicycle
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