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 surface of the sun






2. Titan






3. 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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4. Jupiter






5. Light scattered through the atmosphere that degrades astronomical images






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






7. Electromagnetic Radiation






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






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






10. All possible types of energy that can be emitted and absorbed by atoms.






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






12. The rock that makes up the lunar maria






13. The place in the sky that the Earth's axis points toward (can be either north or south)






14. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






15. Any change in the speed or direction of an object's motion






16. Earth






17. A collection of galaxies like the one the Milky Way belongs to






18. An entity that is likely in the nucleus of most - if not all - galaxies.






19. A planet orbiting about a distant star






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






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






22. 100 nm 10 nm






23. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






24. Material that shoots rapidly out into space. Flares cause Auroras






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






26. A force exerted by reflecting sunlight






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






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






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






30. 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






31. The location in the Milky Way where stars orbit like a solid wheel






32. A volume of space where few - if any - galaxies are located






33. Long - meandering cliff formed when a planet surface cools and shrinks






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






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






36. 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.






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






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






39. A plot of star absolute magnitude verses spectral type.






40. 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.






41. Jupiter - Saturn - Uranus - Neptune






42. VENUS






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






44. The science of measuring light energy by wavelength.






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






46. A star that is burning hydrogen to helium in a shell surrounding it's core






47. 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






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






49. A streak of light in the atmosphere






50. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere







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