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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. The high- temperatature outer layer of the sun
Void
Doppler Shift
Corona
tectonics of Mars
2. 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
Olber's paradox
contrast northern lowlands and the southern highlands of mars...
The Big Bang Theory
Rich Cluster
3. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)
dark matter
Electromagnetic Radiation: Radio
planetary nebula
Cassini division
4. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu
Dwarf planets
accretion
Cepheid variables
epicycle
5. A push or a pull
Primary Mirror
force
Prominence
Nebula
6. 10 nm 10^2 nm
Io (jupiters moon)
Positive - Converge - Greater than 1
High Velocity Stars
Electromagnetic Radiation: X-Ray
7. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.
Reflector
synchronous rotation
Seeing
density waves
8. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting
Prominence
Summer Solstice
Big Crunch
supernova
9. 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
supernova
Vernal Equinox
open star clusters
Cassini division
10. Mercury
Hubble constant
Meridian
most eccentric orbit
Red Giant Branch Star
11. The Greek philosopher responsible for making the stellar magnitude scale.
Hipparchus
Electromagnetic Radiation: X-Ray
Synchrotron Rotation
Quasar
12. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.
Electromagnetic Radiation
Halo
Inverse Square Law
great red spot
13. A two-filter measure of the color - and hence temperature - of a star.
Open - flat - and closed.
nucleus
Color Index
Planck time
14. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas
HII Region
Planetary Nebula
Nova
Eyepiece Lens
15. A younger cluster of stars - found in the galaxy disk
E=mc2
Halo
direct motion
Open Cluster
16. A fusion process in which protons build together to form helium
Focal Plane
Proton-proton chain
Sidereal Day
Absolute Magnitude
17. A logarithmically scaled value for the measured brightness of a star.
Refractor
planetary nebula
Apparent Magnitude
Degeneracy
18. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
Kirchhoff's Law
Ecliptic
Sc spiral galaxy
highlands
19. A massive variable star used to find distances to the galaxies or clusters that contain them.
Dwarf planets
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.
Cepheid Variable
Winter Solstice
20. Is there water on the moon?
Drake equation
Yes - frozen at the poles- remains protected from the suns rays
conjunction
Sidereal Day
21. The distance light travels in one year (=9.46x10^12km).
MOONS: roundest shape
synchrotron radiation
Light-Year
Interstellar Extinction
22. When the Sun is farthest south of the celestial equator (About December 22)
Reflector
rotation curve=winding dilemma?
Winter Solstice
quarks
23. 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)
Titus-Bode Law
Objective Lens
White Dwarf
quasar
24. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.
meteor
quarks
deferent
Autumnal Equinox
25. When the Sun is farthest south of the celestial equator (About December 22)
Winter Solstice
Annular Eclipse
opposition
Active Optics
26. The light produced when particles from the sun collide with atmospheric molecules
aurora
Self-Propogating Star Formation
Geocentric
disk
27. Possible Fates of the Universe
Ganymede (Jupiter)
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
Negative - Diverge - Less than 1
direct motion
28. A huge sphere of tenuous gas surrounding the nucleus of a comet
Secondary Mirror
White Dwarf
fastest rotation
coma
29. A distance measure determined by the shifting of a star against the background sky every 6 months.
MOONS: most geologically active
Parsec
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
Parallax
30. A word used in astronomy to describe all elements besides hydrogen and helium
Metals
Ganymede (Jupiter)
reflection star clusters
Hubble law
31. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)
force
radiation dominated universe
Main Sequence
Hipparchus
32. Mercury and venus
If it is in a denser medium - such as glass - it will move slower
conjunction
Annular Eclipse
fewest moons
33. Mercury
AGN
Poor Cluster
Parsec
smallest diameter
34. Centered on the Earth
Eclipses of the Moons of Jupiter
Active Optics
Geocentric
Asymptotic giant Branch Star
35. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.
molecular clouds
Hydrostatic Equilibrium
Hubble constant
We don't know. It might be but does not have to be.
36. The force of attraction between any two objects having mass
chemical differentiation
deferent
gravity
Open Cluster
37. The gap inthe outer portion of Saturn's A ring
Enke gap
meteor
Population 1 vs Population 2 stars
Big Crunch
38. The apparent magnitude a star would have if it were at a distance of 10 parsecs.
Absolute Magnitude
Void
nova
Cepheid variables
39. The shadow behind the Earth or Moon where the Sun is partially obscured.
plate tectonics
Inverse Square Law
Radio Galaxy
Penumbra
40. Hydrogen and helium (mainly)
Summer Solstice
Callisto (Jupiter)
mapping the structure of Milky Way disk
Make up of the jovian planets
41. The first rock-sized bodies that formed in the solar nebula from dust grains
Titus-Bode Law
molecular clouds
chondrite
Meridian
42. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object
mass
E=mc2
Cepheid Variable
3 reasons we orbit satellites to observe universe
43. The movement of the Earth's crustal plates riding on top of the mantle.
Light: travels like a wave - detected like a particle
Energy Level
plate tectonics
Radio Galaxy
44. Ganymede and Titan
Objective Lens
SETI
MOONS: larger than mercury
Atomic Number
45. Is space infinitely large?
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46. The name for the only seriously considered theory of the universe.
High Velocity Stars
Globular Cluster
Big Bang
critical density
47. The oldest part of the Milky Way
Halo
Rich Cluster
Electromagnetic Radiation
Globular Cluster
48. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)
Kirchhoff's Law
Convection
Continuous Spectrum
Light: travels like a wave - detected like a particle
49. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?
Cosmic Microwave Background (CMB)
If it is in a denser medium - such as glass - it will move slower
Planetary Nebula
Pixel
50. Mercury - Venus - Earth - Mars
Terrestrial Planets
Extrasolar Planet
Particle Horizon
radiation dominated universe
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