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. Radiation given off by electrons accelerating in a magnetic field






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






3. The family of radiant energy that includes light as a subset






4. Mercury






5. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






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






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






8. 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.






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






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






11. What causes the zones and belts on jupiter and saturn?






12. 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)






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






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






15. Jupiter






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






17. A very dense - highly populated cluster of galaxies






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






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






20. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






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






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






23. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






24. The mirror that determines the focus configuration of a reflector






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






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






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






28. 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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29. The act of removing an electron from an atom.






30. A planet that is farther from the sun than the Earth is






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






32. Possible Fates of the Universe






33. Centered on the Earth






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






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






36. A spread of light with an uninterrupted wavelength distribution of energy.






37. A star that blows itself apart






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






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






40. The process similar to conduction by which energy moves from the solar core to the convective layer






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






42. An object that may remain after a star explodes






43. The average distance between the Earth and the Sun (=1.5 x10^8km)






44. 10 nm 10^2 nm






45. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






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






47. 100 nm 10 nm






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






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






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