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. 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






2. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






3. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






4. The north-south line passing directly overhead through the zenith.






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






6. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






7. The part of the Milky way that has on-going star formation






8. A logarithmically scaled value for the measured brightness of a star.






9. A subatomic particle with a negative charge. It creates light.






10. Venus






11. The mass of an object divided by its volume






12. A method of finding a star's distance from its absolute magnitude and spectral type or color.






13. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting






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






15. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






16. A streak of light in the atmosphere






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






18. In what chemical form are jupiters nitrogen - carbon and oxygen?






19. A force exerted by reflecting sunlight






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






21. A term referring to the orbital character of stars near the Sun






22. A push or a pull






23. The fusion process that turns three helium nuclei into a carbon nucleus






24. A huge sphere of tenuous gas surrounding the nucleus of a comet






25. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






26. Collections of young - hot stars






27. The law that syas light energy from a blackbody increases as (temperature^4)






28. Venus (retrograde)






29. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.






30. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig

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31. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






32. A distance measure determined by the shifting of a star against the background sky every 6 months.






33. Electromagnetic Radiation






34. All wavelengths of light emitted by a blackbody.






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






36. A spinning neutron star






37. The gap inthe outer portion of Saturn's A ring






38. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






39. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






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






41. Saturn






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






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






44. Mercury






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






46. A galaxy sending out a stream of material from its nucleus






47. When material is heated and moves taking the heat energy with it






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






49. What Ole Roemer used to measure the speed of light in a vacuum






50. The equation that describes how matter equates with energy