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. A star that blows itself apart






2. The gap etween saturn's A and B rings






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






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






5. A change in the appearance of the sun at the edge of the solar disk






6. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






7. A bridge of material held in position above the solar surface. They can remain for hours even days






8. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.






9. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






10. Venus






11. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






12. 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)






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






14. Infinitely long -> 10 cm






15. Infinitely long -> 10 cm






16. The entity from which the whole universe is postulated to have come from.






17. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






18. Radiation given off by electrons accelerating in a magnetic field






19. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






20. The dark - relativley smooth areas on the moon; Latin for sea






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






22. First accurately measured the speed of light in a vacuum






23. The 'edge' of the universe. Light beyond this has not reached us yet.






24. An empirical scheme for predictin ghe orbital distances of planets






25. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






26. Is space infinitely large?

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27. A term referring to Earth-like planets






28. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.






29. A fusion process in which protons build together to form helium






30. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






31. Ganymede






32. The point in its orbit where a planet is nearest the sun






33. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






34. A word used in astronomy to describe all elements besides hydrogen and helium






35. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






36. Venus (retrograde)






37. A star that is in the process of forming. It glows from gravitational contraction






38. A rock or iron specimen that has fallen from space






39. When the Sun moves from south to north across the celestial equator (about March 21)






40. A perfect absorber and radiator of electromagnetic radiation.






41. A term referring to Earth-like planets






42. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






43. A star that blows itself apart






44. A small chunk of rock in space






45. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






46. The high- temperatature outer layer of the sun






47. The apparent path of the Sun through the stars on the celestial sphere.






48. The force of attraction between any two objects having mass






49. Matter that reveals itself only through its gravitational attraction






50. A continuous spectrum of light missing energy at a few wave lengths.