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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. A word meaning 'the same everywhere throughout.'
homogeneous
interstellar dust
radiant
A family of radiant energy- includes light
2. A quantity measuring the stability of the Earth's atmosphere
Penumbra
Seeing
force
radiation dominated universe
3. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter
Winter Solstice
Bok Globule
Winter Solstice
neutrino
4. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.
direct motion
tectonics of Venus
density parameter
Photon
5. A word used in astronomy to describe all elements besides hydrogen and helium
Population 1 vs Population 2 stars
Metals
The Local Group
opposition
6. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.
jovian
Cosmic Microwave Background (CMB)
Oort cloud
Gamma ray bursts
7. The rotation of a star or planet at different speeds at its equator and poles
Flare
Perihelion
differential rotation
Limb darkening
8. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant
Thermal Equilibrium
protostar
Blackbody
Steady State Theory (Leads to Olber's Paradox)
9. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc
Yes - frozen at the poles- remains protected from the suns rays
critical density
Kuiper belt
Neutron Star
10. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas
Dark Nebula
direct motion
Chandrasekhar Limit
terrestrial planet
11. The science of measuring the apparent magnitudes of stars by imaging them through different filters.
Ammonia - methane - and water
Gravitational Lens
Photometry
retrograde motion
12. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.
Winter Solstice
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
Void
3 reasons we orbit satellites to observe universe
13. A location on an H-are Diagram where evolving stars pulsate
Geocentric
Primary Mirror
Instability strip
Roundest orbit
14. A star that blows itself apart
Milky way Galaxy
Maria
Molecular Clouds
Supernova (You can be my supernova girl)
15. A huge sphere of tenuous gas surrounding the nucleus of a comet
radio galaxy
coma
Make up of the terrestrial planets
great dark spots
16. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.
Electron
Wein's Law
3 reasons we orbit satellites to observe universe
self-propagating star formation
17. The location of a supermassive black hole
cosmological red shift
Meridian
Nucleus
rotation curve=winding dilemma?
18. A collection of galaxies like the one the Milky Way belongs to
Precession
great dark spots
solar nebula
Poor Cluster
19. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation
resonance
MOONS: thickest atmosphere
comet
AGN
20. A planet that is closer to the sun than the earth
gravity
Instability strip
blazar
inferior planets
21. The point in its orbit where a planet is farthest from the sun
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
Most dense
Ground State
aphelion
22. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE
Lagrangian Razor
density
Halo
Io (jupiters moon)
23. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)
Absolute Magnitude
Light-Year
H2 Regions
asteroid
24. 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
AGN
hottest surface
Hubble law
Radiative Diffusion
25. A fusion process in which protons build together to form helium
How is winding dilemma solved?
Oort cloud
Proton-proton chain
Negative - Diverge - Less than 1
26. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE
Ganymede (Jupiter)
Grand design spirals
Bok Globule
Milky way Galaxy
27. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE
Steady State Theory (Leads to Olber's Paradox)
quarks
Ammonia - methane - and water
Callisto (Jupiter)
28. An element of a highly efficient - two-dimensional electronic light detector
Pixel
direct motion
Superior planets
Thermal Equilibrium
29. The north-south line passing directly overhead through the zenith.
Meridian
Photosphere
Blackbody Curve
MOONS: roundest shape
30. Sc galaxies
roche limit
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
Dwarf planets
Flocculent spirals
31. Poitns of gravitational stability in the orbit of a planet
Density Wave
Red Giant
Sidereal Day
Lagrangian Razor
32. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:
tectonics of Earth
tectonics of Venus
aphelion
Drake equation
33. An important quality of telescopes that increases as the square of the primary mirror or objective lens
Positive - Converge - Greater than 1
Light Gathering Power
Halo
Big Crunch
34. A two-filter measure of the color - and hence temperature - of a star.
protostar
Spectroscopic parallax
Primary Mirror
Color Index
35. A push or a pull
Kirkwood gaps
force
quasar
inferior planets
36. The equation that describes how matter equates with energy
E=mc2
belt
HII Region
Photometry
37. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object
Electromagnetic Radiation: Radio
accretion disk
difference between maria and highlands of the moon.
Spectral Lines
38. The amount an image is enlarged by a telescope
Parallax
Black Hole
Magnification
supermassive black hole
39. The shadow area behind the Earth or Moon where the Sun is completely obscured.
Electromagnetic Radiation
asteroid
Wein's Law
Umbra
40. Mercury and venus
fewest moons
Trojan asteroids
Light Curve
terrestrial planet
41. Any change in the speed or direction of an object's motion
acceleration
Objective Lens
Occam's razor
Total Eclipse
42. A crystalline patter found in iron meteorites
AGN
widmanstatten pattern
Synchrotron Rotation
Rich Cluster
43. A subatomic particle with a negative charge. It creates light.
Milky way Galaxy
Poor Cluster
Dark Nebula
Electron
44. Jupiter
Apparent Magnitude
Largest diameter
A family of radiant energy- includes light
Zenith
45. The lens that gathers the light in a refractor
300000 KM/sec
Milky way Galaxy
Objective Lens
meteoriod
46. Material that shoots rapidly out into space. Flares cause Auroras
Flare
density parameter
The Local Group
Ground State
47. A point in the sky where meteors appear to come from during a shower
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.
Ground State
radiant
Electromagnetic Radiation: Radio
48. Milky way galaxy is a member - a small poor cluster-about 30 galaxies
Spectral Lines
hottest surface
standard candle
The Local Group
49. A small and dim but hot star.
Bulge
White Dwarf
Spectroscopy
roche limit
50. 10 cm -> 1 mm
Electromagnetic Radiation: Microwave
Jupiters red spot
Brown dwarf
The Local Group