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






2. Mercury - Venus - Earth - Mars






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






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






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






6. The act of removing an electron from an atom.






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






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






9. The lens that gathers the light in a refractor






10. A push or a pull






11. A prominence seen against the disk of the sun






12. 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






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






14. A telescope that uses lenses to focus light






15. The process of acquiring material






16. The mass of an object divided by its volume






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






18. The lowest energy of an atom.






19. Jupiter






20. Jupiter






21. A small round distribution of gas surrounding a dying star






22. The law that describes the blackbody curve - and let to quantum mechanics.

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






24. Infinitely long -> 10 cm






25. The rotation period of the Earth measured relative to the stars.






26. The location of a supermassive black hole






27. When a planet lines up with the sun inthe sky






28. A small and dim but hot star.






29. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






30. What do we think the actual fate of the universe will be and why do we think this?






31. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






32. A word meaning 'the same in all directions.'






33. Collections of young - hot stars






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






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






36. Any class of objects with a uniform luminosity used to determine distance.






37. The Greek philosopher responsible for making the stellar magnitude scale.






38. A star that blows itself apart






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






40. A streak of light in the atmosphere






41. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






42. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






43. The lens in a telescope used to determine the magnification






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






45. 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

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46. Mercury and venus






47. 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)






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






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






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