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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. Venus
Red Giant Branch Star
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
tectonics of Venus
Roundest orbit
2. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes
Differential Rotation
radio galaxy
Steady State Theory (Leads to Olber's Paradox)
slowest rotation
3. A force exerted by reflecting sunlight
The Local Group
radiation pressure
accretion disk
matter dominated universe
4. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)
hottest surface
Differential Rotation
meteor shower
quasar
5. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)
rotation curve = dark matter?
300000 KM/sec
Kuiper belt
Globular Cluster
6. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the
If it is in a denser medium - such as glass - it will move slower
The Big Bang Theory
Continuous Spectrum
Cosmological Principle
7. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.
Electromagnetic Radiation: Microwave
tectonics of Mars
MOONS: largest size
Vernal Equinox
8. Is space infinitely large?
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9. A faint - remarkably uniform distribution of radiation in space
dark matter
Dark matter candidates
Interstellar Extinction
Cosmic Microwave Background
10. The source of the force that is accelerating the expansion rate of the universe.
dark energy
mare basalt
tectonics of Earth
Hubble law
11. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.
gravity
meteoriod
Hipparchus
shape and color of SPIRAL galaxies
12. Heavier elements such as iron - silicon - magnesium - sulfer - nickel
Thermal Equilibrium
Magnification
Make up of the terrestrial planets
Self-Propogating Star Formation
13. The place in the sky that the Earth's axis points toward (can be either north or south)
300000 KM/sec
cosmic singularity
Colestial Pole
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
14. 100 nm 10 nm
Extrasolar Planet
thinnest atmosphere
Electromagnetic Radiation: Ultraviolet Light
acceleration
15. Elliptical orbits that come inside orbit of the Earth.
weight
Turn off Point
Apollo asteroids
Light Pollution
16. Possible Fates of the Universe
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
plate tectonics
homogeneous
Electromagnetic Radiation: Radio
17. The location of a supermassive black hole
great dark spots
Nucleus
Black Hole
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
18. The oldest part of the Milky Way
Bok Globule
300000 KM/sec
Blackbody
Halo
19. The location around an atom where an electron resides.
Energy Level
SETI
Vernal Equinox
Parallax
20. The apparent magnitude a star would have if it were at a distance of 10 parsecs.
Black Hole
fastest rotation
Absolute Magnitude
CNO Cycle
21. A large and bright but cool star.
Hyashi track
Radio Galaxy
quasar
Red Giant
22. Mercury
density parameter
Make up of the terrestrial planets
Extrasolar Planet
most eccentric orbit
23. The gap inthe outer portion of Saturn's A ring
Yes - frozen at the poles- remains protected from the suns rays
E=mc2
Resolving Power
Enke gap
24. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto
Kuiper belt
Filament
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
zone
25. When the Sun is farthest south of the celestial equator (About December 22)
Apparent Magnitude
A family of radiant energy- includes light
Winter Solstice
Light Gathering Power
26. A bright area of higher temperature that often proceeds the formation of sunspots.
Rich vs poor clusters
Pixel
Plague
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.
27. A word used in astronomy to describe all elements besides hydrogen and helium
Steady State Theory (Leads to Olber's Paradox)
radio galaxy
Metals
Liquid metallic hydrogen
28. A fusion process in which protons build together to form helium
Proton-proton chain
Refractor
Synchrotron Rotation
neutrino
29. 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
White Dwarf
Corona
cosmological red shift
30. The distance a moon can be from a planet before shattering from tidal forces
Seyfert galaxy
roche limit
Electron
Interstellar Extinction
31. In Ptolemy's geocentric solar system - the small circle on which a planet moved.
epicycle
Planetary Nebula
Chandrasekhar Limit
Electromagnetic Radiation
32. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)
Instability strip
Largest diameter
greatest elongation
synchronous rotation
33. Where is the center of the expansion
Color Index
aurora
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.
Metals
34. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction
asteroid
Electromagnetic Radiation: Infrared
Electromagnetic Radiation: Radio
interstellar dust
35. A force exerted by reflecting sunlight
Flat - Remain Parallel - Exactly 1
radiation pressure
Halo
Annular Eclipse
36. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)
Dark matter candidates
Pixel
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
Plank's Law
37. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.
cosmic fireball
tectonics of Earth
Kuiper belt
regolith
38. The layer of the sun just above the photosphere
Callisto (Jupiter)
Ganymede (Jupiter)
Corona
Chromosphere
39. An entity that is likely in the nucleus of most - if not all - galaxies.
How is winding dilemma solved?
cosmological red shift
supermassive black hole
interstellar dust
40. A small chunk of rock in space
3 reasons we orbit satellites to observe universe
Differential Rotation
meteoriod
Make up of the jovian planets
41. The material from which the solar system formed
solar nebula
weight
Apollo asteroids
density waves
42. A spread of light with an uninterrupted wavelength distribution of energy.
Continuous Spectrum
accretion disk
Hubble constant
most moons
43. 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.
Spectroscopy
Synodic Day
nova
Nucleus
44. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.
Flat - Remain Parallel - Exactly 1
isotropic
CMB
Electromagnetic Radiation: Radio
45. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.
thinnest atmosphere
Asymptotic giant Branch Star
difference between maria and highlands of the moon.
comet
46. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.
Cepheid Variable
Radiative Diffusion
Prominence
Neutron Star
47. Radiation given off by electrons accelerating in a magnetic field
Electromagnetic Radiation: Microwave
Synchrotron Rotation
Gamma ray bursts
Main Sequence Stars
48. 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
Geocentric
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Resolving Power
supernova
49. Earth
homogeneous
Milky way Galaxy
Planetary Nebula
Most dense
50. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging
Big Crunch
CCD
Electromagnetic Radiation: Radio
radiation pressure
Can you answer 50 questions in 15 minutes?
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