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 small chunk of rock in space






2. The point directly overhead.






3. 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.






4. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






5. Titan






6. Venus (retrograde)






7. A quantity measuring the stability of the Earth's atmosphere






8. The mass of an object divided by its volume






9. The 'edge' of the universe. Light beyond this has not reached us yet.






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






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






12. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR






13. The law stating that hotter blackbodies look bluer than cooler blackbodies.

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






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






16. 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)






17. 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)






18. Approximate speed of light in a vacuum






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






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






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






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






23. IO






24. The mirror that gathers the light in a reflector






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






26. A star that is in the process of forming. It glows from gravitational contraction






27. A telescope that uses mirrors to focus light






28. The seasonal shifting of a nearby star's position relative to more distant objects.






29. An important quality of telescopes that increases as the square of the primary mirror or objective lens






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






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






32. The oldest part of the Milky Way






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






34. The rotation of a star or planet at different speeds at its equator and poles






35. Electromagnetic Radiation






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






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






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






39. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






40. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






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






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






43. The movement of the Earth's crustal plates riding on top of the mantle.






44. The equation that describes how matter equates with energy






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






46. The imaginary sphere centered on the Earth that hols the stars.






47. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






48. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






49. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






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