SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. Radiation given off by electrons accelerating in a magnetic field
Synchrotron Rotation
radiation pressure
Electromagnetic Radiation: Visible Light
Pulsar
2. The oldest part of the Milky Way
Superior planets
Halo
Open Cluster
Doppler Shift
3. Material that shoots rapidly out into space. Flares cause Auroras
contrast northern lowlands and the southern highlands of mars...
Flare
synchronous rotation
Radiative Diffusion
4. Matter that reveals itself only through its gravitational attraction.
AGN
dark matter
Degeneracy
Chromosphere
5. How is the Hubble Law consistent with an expanding universe?
radio galaxy
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.
reflection star clusters
anorthosite
6. A galaxy sending out a stream of material from its nucleus
Radio Galaxy
Dwarf planets
shape and color of SPIRAL galaxies
tectonics of Venus
7. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)
Sc spiral galaxy
How is winding dilemma solved?
rotation curve=winding dilemma?
semimajor axis
8. Is there water on the moon?
meteor shower
Yes - frozen at the poles- remains protected from the suns rays
Io (jupiters moon)
plate tectonics
9. Dark - reddish - low-pressure bands in Jupiter's atmosphere
Umbra
300000 KM/sec
belt
cosmic singularity
10. Titan
supernova
300000 KM/sec
MOONS: thickest atmosphere
superclusters
11. The mirror that determines the focus configuration of a reflector
HII Region
Red Giant Branch Star
Secondary Mirror
How is winding dilemma solved?
12. When the Moon entirely blocks the Sun.
Largest diameter
Metals
The Local Group
Total Eclipse
13. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.
Light Gathering Power
era of recombination
Make up of the terrestrial planets
isotropic
14. Comglomerates of ice and rock that orbit the sun in highly elliptical paths
Flocculent spirals
Black Hole
comet
Jovian Planets
15. 1 mm 1μm
Electromagnetic Radiation: Infrared
Secondary Mirror
quarks
Chromosphere
16. A bridge of material held in position above the solar surface. They can remain for hours even days
Yes - frozen at the poles- remains protected from the suns rays
Prominence
hottest surface
shape and color of ELLIPTICAL galaxies
17. The name for the only seriously considered theory of the universe.
Cosmic Microwave Background
MOONS: thickest atmosphere
Big Bang
matter dominated universe
18. A star that erratically and explosively brightens and dims
accretion
High Velocity Stars
Nova
Kuiper belt
19. A term referring to Earth-like planets
Cosmological Principle
terrestrial planet
SETI
Triple Alpha rocess
20. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?
Pixel
Dark Matter
If it is in a denser medium - such as glass - it will move slower
Umbra
21. The amount an image is enlarged by a telescope
Magnification
MOONS: roundest shape
Shepherd satellite
Filament
22. The rotation period of the Earth measured relative to the stars.
Kirkwood gaps
Superior planets
Flare
Sidereal Day
23. A push or a pull
Make up of the terrestrial planets
Hubble law
Annular Eclipse
force
24. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.
Kirkwood gaps
regolith
radiant
molecular clouds
25. The entity responsible for spiral arms in grand-design spiral galaxies
plate tectonics
Convection
zone
Density Wave
26. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)
Absorption Spectrum
MOONS: most geologically active
Planck time
Positive - Converge - Greater than 1
27. Matter so dense that even light cannot escape its gravity
general star population
contrast northern lowlands and the southern highlands of mars...
Black Hole
interstellar dust
28. The north-south line passing directly overhead through the zenith.
Radiative Diffusion
Olber's paradox
Spectroscopic Parallax
Meridian
29. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.
zone
Grand design spirals
Electromagnetic Radiation: X-Ray
Neutron Star
30. A method of finding a star's distance from its absolute magnitude and spectral type or color.
Spectroscopic Parallax
Red Giant
Main Sequence
Flat - Flat
31. 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
Electromagnetic Radiation: Ultraviolet Light
supermassive black hole
Electromagnetic Radiation: Radio
32. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.
Plank's Law
quasar
Gamma ray bursts
Superior planets
33. A small spherical dark nebula
greehouse effects
Astronomical Unit
H-are Diagram
Bok Globule
34. The rotation period of the Earth measured relative to the Sun.
tectonics of Mars
Synodic Day
most moons
radio galaxy
35. The elementary building blocks from which protons and neutrons are formed.
Flocculent spirals
quarks
Steady State Theory (Leads to Olber's Paradox)
Meridian
36. Collections of young - hot stars
radio galaxy
general star population
OB Associations
Particle Horizon
37. Light-colored high-pressure bands in Jupiter's atmosphere
Electromagnetic Radiation: Microwave
zone
Planck time
Radio Galaxy
38. The larger bodies that formed early in teh solar nebula that were chemically differentiated
planetesimal
Poor Cluster
Enke gap
Asymptotic giant Branch Star
39. First accurately measured the speed of light in a vacuum
reflection star clusters
Interstellar Extinction
Ole Roemer
Terrestrial Planets
40. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.
Continuous Spectrum
Flat - Flat
terrestrial planet
Active Optics
41. The 'edge' of the universe. Light beyond this has not reached us yet.
partile horizon
Positive - Converge - Greater than 1
plate tectonics
3 reasons we orbit satellites to observe universe
42. In what chemical form are jupiters nitrogen - carbon and oxygen?
most moons
Ammonia - methane - and water
zone
mass
43. The location of a supermassive black hole
Nucleus
mare basalt
Photon
Apollo asteroids
44. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
Io (jupiters moon)
Sc spiral galaxy
fusion crust
Gravitational Lens
45. When one side of a body always faces the planet it revolves around
A family of radiant energy- includes light
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
synchronous rotation
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
46. The shadow area behind the Earth or Moon where the Sun is completely obscured.
Coronal Loop
Void
Umbra
Focal Plane
47. The distance light travels in one year (=9.46x10^12km).
Light-Year
Negative - Diverge - Less than 1
cosmic singularity
Maria
48. The imaginary sphere centered on the Earth that hols the stars.
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
AGN
Celestial Sphere
Extrasolar Planet
49. Ganymede and Titan
deferent
Granules
CMB
MOONS: larger than mercury
50. The point in its orbit where a planet is nearest the sun
mare basalt
Perihelion
radio galaxy
Cosmic Microwave Background