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






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






3. Where is the center of the expansion






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






5. Venus






6. The displacement of spectral lines to redder colors caused by the expansion of the universe.






7. The displacement of spectral lines to redder colors caused by the expansion of the universe.






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






9. The distance a moon can be from a planet before shattering from tidal forces






10. A small chunk of rock in space






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






12. 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 _____.






13. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






14. 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.






15. When material is heated and moves taking the heat energy with it






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






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






18. Venus






19. Poitns of gravitational stability in the orbit of a planet






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






21. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






22. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






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






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






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






26. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






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






28. Sc galaxies






29. Matter that reveals itself only through its gravitational attraction.






30. Poitns of gravitational stability in the orbit of a planet






31. 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)






32. The law that syas light energy from a blackbody increases as (temperature^4)






33. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






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






35. The force of attraction between any two objects having mass






36. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






37. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






38. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.






39. The first rock-sized bodies that formed in the solar nebula from dust grains






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






41. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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42. Venus






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






44. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






45. The location of a supermassive black hole






46. A point in the sky where meteors appear to come from during a shower






47. The entity responsible for spiral arms in grand-design spiral galaxies






48. A force exerted by reflecting sunlight






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






50. Mercury