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. Collections of young - hot stars






2. The distance light travels in one year (=9.46x10^12km).






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






4. 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






5. The equation that describes how matter equates with energy






6. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






7. The mix of pure photon energy that emerged at the start of the universe.






8. The apparent backward motion of a planet against the background of stars.






9. The rock that makes up the lunar maria






10. Approximate speed of light in a vacuum






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






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






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






14. The projection of the Earth's equator onto the celestial sphere.






15. When one side of a body always faces the planet it revolves around






16. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






17. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






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






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






20. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






21. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






22. 10 nm 10^2 nm






23. The material from which the solar system formed






24. 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)






25. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






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






27. Venus (retrograde)






28. When the Sun is farthest south of the celestial equator (About December 22)






29. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






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






31. Elliptical orbits that come inside orbit of the Earth.






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






33. IO






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






35. The process that powers the sun and hydrogen bombs






36. A two-filter measure of the color - and hence temperature - of a star.






37. Hydrogen and helium (mainly)






38. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






39. 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






40. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






41. 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)






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






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






44. Is there water on the moon?






45. A push or a pull






46. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


47. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






48. The larger bodies that formed early in teh solar nebula that were chemically differentiated






49. Form honeycomb like patterns surrounding empty or nearly empty voids.






50. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies