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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 term referring to the orbital character of stars near the Sun
Electromagnetic Radiation: X-Ray
A family of radiant energy- includes light
Differential Rotation
Main Sequence Stars
2. The entity from which the whole universe is postulated to have come from.
Electromagnetic Radiation: Visible Light
Nucleus
Maria
cosmic singularity
3. The average distance between the Earth and the Sun (=1.5 x10^8km)
Astronomical Unit
Planetary Nebula
Precession
general star population
4. The force of attraction between any two objects having mass
Halo
radio lobe
supermassive black hole
gravity
5. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas
belt
CMB
HII Region
mapping the structure of Milky Way disk
6. That which is responsible for Jupiter's magnetic field
Callisto (Jupiter)
Liquid metallic hydrogen
Degeneracy
meteoriod
7. The rock that makes up the lunar maria
mare basalt
critical density
Horizontal Branch Star
quarks
8. An evolved star - past the helium flash that is burning helium to carbon in it's cores
Horizontal Branch Star
Secondary Mirror
How is winding dilemma solved?
Dark Nebula
9. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth
Blackbody Curve
Sa spiral galaxy
Spectroscopic parallax
Seeing
10. The location of a supermassive black hole
Nucleus
Neutron Star
Halo
terrestrial planet
11. A telescope that uses mirrors to focus light
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
Reflector
Rich Cluster
differential rotation
12. Venus
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.
Self-Propogating Star Formation
meteor
Roundest orbit
13. The gap etween saturn's A and B rings
Cassini division
H-are Diagram
Instability strip
interstellar dust
14. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies
OB Associations
Continuous Spectrum
Nebula
direct motion
15. The oldest terrain on the moon
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.
highlands
Most dense
neutrino
16. The Greek philosopher responsible for making the stellar magnitude scale.
CCD
Blackbody
Hipparchus
radiant
17. Why does the earth have few craters while the moon has many?
Supernova (You can be my supernova girl)
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Flocculent spirals
cosmological principle
18. A bridge of material held in position above the solar surface. They can remain for hours even days
Prominence
terrestrial planet
Main Sequence Stars
Seyfert galaxy
19. 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
Emission Spectrum
Wein's Law
Make up of the terrestrial planets
20. A small round distribution of gas surrounding a dying star
Spectral Lines
scarp
Planetary Nebula
mass
21. An important quality of telescopes that increases as the square of the primary mirror or objective lens
Photometry
Electromagnetic Radiation: X-Ray
Light Gathering Power
Summer Solstice
22. The high- temperatature outer layer of the sun
Corona
Spectroscopic parallax
plate tectonics
Electromagnetic Radiation: Visible Light
23. The mix of pure photon energy that emerged at the start of the universe.
cosmic fireball
Energy Level
synchronous rotation
Main Sequence Stars
24. Saturn
MOONS: most geologically active
Planck time
epicycle
least dense
25. The organization of clusters of galaxies into sheets and strings
Ionization
Spectral Lines
SETI
Supercluster
26. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE
Continuous Spectrum
Europa (Jupiters moon)
interstellar dust
Proton-proton chain
27. The seasonal shifting of a nearby star's position relative to more distant objects.
E=mc2
Parallax
Nova
mare basalt
28. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy
Sc spiral galaxy
Reflector
Umbra
Trojan asteroids
29. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.
Hubble law
Black Hole
asteroid
resonance
30. Any change in the speed or direction of an object's motion
chemical differentiation
Dark Matter
Metals
acceleration
31. Clouds of low density gas often found glowing faintly on either side of an AGN.
AGN
radio lobe
Absorption Spectrum
Yes - frozen at the poles- remains protected from the suns rays
32. Matter so dense that even light cannot escape its gravity
Black Hole
Planetary Nebula
least dense
Hubble constant
33. A location on an H-are Diagram where evolving stars pulsate
Corona
Instability strip
Electromagnetic Radiation: Radio
Color Index
34. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.
Turn off Point
Kuiper belt
Celestial Sphere
Jovian Planets
35. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)
Electromagnetic Radiation: Microwave
supernova
Nova
Oort cloud
36. The projection of the Earth's equator onto the celestial sphere.
tectonics of Mars
Disk
Celestial Equator
Total Eclipse
37. 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.
CMB
Sb spiral galaxy
Drake equation
Dwarf planets
38. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging
Bok Globule
CCD
radiation pressure
Sidereal Day
39. A quantity measuring the stability of the Earth's atmosphere
Plague
Seeing
H2 Regions
fusion crust
40. How did Earth come to have an oxygen rich atmosphere?
Sa spiral galaxy
planetesimal
If it is in a denser medium - such as glass - it will move slower
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.
41. Collections of young - hot stars
Plank's Law
Corona
Halo
OB Associations
42. 10 nm 10^2 nm
Reflector
Electromagnetic Radiation: X-Ray
Maria
shape and color of ELLIPTICAL galaxies
43. The slow wobble of the Earth on its rotation axis.
Precession
regolith
Apollo asteroids
Gamma-ray Burst
44. Ganymede and Titan
Spectroscopy
critical density
MOONS: larger than mercury
Halo
45. The oldest grouping of stars - found in the galaxy halo
Globular Cluster
interstellar dust
Parallax
Instability strip
46. Matter that reveals itself only through its gravitational attraction.
Earth resurfaces itself due to erosion and plate tectonics - while the moon has neither.
Plank's Law
dark matter
density parameter
47. All wavelengths of light emitted by a blackbody.
Interstellar Extinction
meteor shower
Halo
Blackbody Curve
48. A younger cluster of stars - found in the galaxy disk
Thermal Equilibrium
Enke gap
Open Cluster
Planetary Nebula
49. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)
Chromosphere
cosmological principle
Maria
Blackbody
50. A spinning neutron star
Winter Solstice
Pulsar
CMB
epicycle