Test your basic knowledge |

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 gap etween saturn's A and B rings






2. When massive objects bend space and time enough to create multiple images of an object located behind them






3. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






4. The relation that tells how light dims with distance.






5. Any class of objects with a uniform luminosity used to determine distance.






6. 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)






7. Titan






8. A phenomenon seen when the Earth passes through the orbit of a burned out comet






9. What are the three possible geometries of the universe?






10. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE






11. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.






12. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






13. The most mass a white dwarf can have before collapsing to a neutron star






14. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






15. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






16. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






17. The organization of clusters of galaxies into sheets and strings






18. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






19. Very center of galaxy. suggestion of a black hole






20. The location of a supermassive black hole






21. Why do Galaxies move very rapidly in the interiors of the dense clusters?






22. The sinking of denser elements to the center of a young molten planet






23. A particle of light.






24. Jupiter






25. A streak of light in the atmosphere






26. The rock that makes up the lunar highlands






27. The seasonal shifting of a nearby star's position relative to more distant objects.






28. A massive variable star used to find distances to the galaxies or clusters that contain them.






29. The normal eastward movement of a planet against the background of hte distant stars.






30. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






31. The name for the only seriously considered theory of the universe.






32. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






33. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.






34. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






35. 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)






36. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






37. The seasonal shifting of a nearby star's position relative to more distant objects.






38. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation






39. Heavier elements such as iron - silicon - magnesium - sulfer - nickel






40. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






41. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years






42. Matter so dense that even light cannot escape its gravity






43. Light-colored high-pressure bands in Jupiter's atmosphere






44. 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.






45. A spectrum of light with energy at only a few wavelengths.






46. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






47. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






48. The oldest part of the Milky Way






49. When a planet lines up with the sun inthe sky






50. An evolved star - past the helium flash that is burning helium to carbon in it's cores