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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. When a planet lines up with the sun inthe sky
Photosphere
conjunction
Nebula
density
2. 10 nm 10^2 nm
Umbra
Clouds of sufuric acid (very inhospitable and brightest object in the sky) - process called greenhouse affect traps radiation making it 900 degrees at times - spins with retrograde rotation (sun rises in west) and takes 58.4 days for it to set. Thick
Electromagnetic Radiation: X-Ray
Umbra
3. The apparent backward motion of a planet against the background of stars.
Radio Galaxy
High Velocity Stars
HII Region
retrograde motion
4. A representation of the changes in color and brightness of an evolving protostar.
resonance
zone
Flat - Remain Parallel - Exactly 1
Hyashi track
5. Earth
Most dense
Neutron Star
fastest rotation
most eccentric orbit
6. The 'edge' of the universe. Light beyond this has not reached us yet.
partile horizon
Photosphere
cosmic fireball
Hubble law
7. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)
greatest elongation
quasar
Red Giant Branch Star
Blackbody
8. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.
Positive - Converge - Greater than 1
protostar
Cassini division
quarks
9. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.
Celestial Equator
Negative - Diverge - Less than 1
disk
Differential Rotation
10. When the Moon entirely blocks the Sun.
Total Eclipse
OB Associations
Extrasolar Planet
Pixel
11. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter
Photosphere
neutrino
shape and color of ELLIPTICAL galaxies
Spectroscopic Parallax
12. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)
Ecliptic
SETI
Prominence
Sunspots
13. The science of measuring light energy by wavelength.
Electromagnetic Radiation: Infrared
Spectroscopy
Cepheid variables
Proton-proton chain
14. 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.
tectonics of Mars
Brown dwarf
Roundest orbit
Perihelion
15. 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)
Population 1 vs Population 2 stars
Sunspot cycle
rotation curve = dark matter?
reflection star clusters
16. Jupiter
density
Gamma ray bursts
most moons
Absolute Magnitude
17. Sc galaxies
Doppler Shift
Color Index
Flocculent spirals
Hubble law
18. The rotation of a star or planet at different speeds at its equator and poles
differential rotation
Kuiper belt
evidence of water on mars
Enke gap
19. Orbit in Jupiters orbit
disk
Trojan asteroids
Spectral Lines
Celestial Equator
20. A word meaning 'the same everywhere throughout.'
accretion
general star population
homogeneous
Hyashi track
21. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.
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22. The normal eastward movement of a planet against the background of hte distant stars.
direct motion
meteor shower
Penumbra
Rich Cluster
23. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction
Eclipses of the Moons of Jupiter
Lagrangian Razor
Poor Cluster
interstellar dust
24. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE
Planetary Nebula
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.
Europa (Jupiters moon)
Electromagnetic Radiation: Visible Light
25. 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.
Hydrostatic Equilibrium
aurora
Black Hole
High Velocity Stars
26. When massive objects bend space and time enough to create multiple images of an object located behind them
thinnest atmosphere
Gravitational Lens
Filament
Electromagnetic Radiation: Gamma Ray
27. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.
Largest diameter
Cepheid variables
greehouse effects
Thermonuclear Fusion
28. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.
Cosmic Microwave Background (CMB)
2 Reasons Why there are Supermassive Black holes at the center of every Galaxy
Perihelion
Neutron Star
29. The process similar to conduction by which energy moves from the solar core to the convective layer
rotation curve = dark matter?
Thermonuclear Fusion
Radiative Diffusion
Kuiper belt
30. The first rock-sized bodies that formed in the solar nebula from dust grains
Electromagnetic Radiation: Microwave
MOONS: most geologically active
self-propagating star formation
chondrite
31. 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.
Convection
terrestrial planet
Kuiper belt
nova
32. Material that shoots rapidly out into space. Flares cause Auroras
The Local Group
Flare
Electromagnetic Radiation: Ultraviolet Light
interstellar dust
33. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)
How is winding dilemma solved?
shape and color of ELLIPTICAL galaxies
Oort cloud
Refractor
34. The surface of the sun
Negative - Diverge - Less than 1
Atomic Number
Photosphere
Olber's paradox
35. The rate of expansion of the universe.
Synchrotron Rotation
smallest diameter
Hubble constant
Most dense
36. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter
Chandrasekhar Limit
open star clusters
neutrino
Blackbody
37. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation
AGN
Light Gathering Power
OB Associations
Oort cloud
38. Clouds of low density gas often found glowing faintly on either side of an AGN.
radio lobe
Atomic Number
Absorption Spectrum
Inverse Square Law
39. What Ole Roemer used to measure the speed of light in a vacuum
Oort cloud
meteoriod
Secondary Mirror
Eclipses of the Moons of Jupiter
40. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)
Ecliptic
neutrino
opposition
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.
41. What is the universe expanding into?
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.
Absorption Spectrum
Spectroscopic parallax
Asymptotic giant Branch Star
42. Electromagnetic Radiation
Negative - Diverge - Less than 1
A family of radiant energy- includes light
density waves
3 reasons we orbit satellites to observe universe
43. The location in the Milky Way where stars orbit like a solid wheel
Gamma-ray Burst
Bulge
fusion crust
Convection
44. The location of a supermassive black hole
Nucleus
epicycle
Drake equation
Color Index
45. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process
CNO Cycle
Electromagnetic Radiation: Visible Light
Poor Cluster
Nucleus
46. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)
cosmological principle
aurora
Occam's razor
Autumnal Equinox
47. 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.
Supernova (You can be my supernova girl)
Hydrostatic Equilibrium
The Local Group
gravity
48. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies
Nebula
Electromagnetic Radiation: Ultraviolet Light
Molecular Clouds
radio lobe
49. The process responsible for creating the arms of flocculent spiral galaxies
Self-Propogating Star Formation
Electromagnetic Radiation: Ultraviolet Light
neutrino
Penumbra
50. The most mass a white dwarf can have before collapsing to a neutron star
retrograde motion
Plague
Chandrasekhar Limit
Limb darkening