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. Venus






2. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






3. A force exerted by reflecting sunlight






4. A particle of light.






5. Clouds of low density gas often found glowing faintly on either side of an AGN.






6. The layer of the sun just above the photosphere






7. What is the universe expanding into?






8. The source of the force that is accelerating the expansion rate of the universe.






9. 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.






10. Centered on the Earth






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






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






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






15. Then the Sun moves from north to south across the celestial equator (about September 23)






16. A repeated - periodic push or pull capable of summing into a larger push or pull






17. Either Io -Europa - Ganymede - or Callisto






18. Ganymede and Titan






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






20. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






21. A term referring to the orbital character of stars near the Sun






22. Light scattered through the atmosphere that degrades astronomical images






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






24. Ganymede and Titan






25. Europa






26. Why does the earth have few craters while the moon has many?






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






28. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






29. Clouds of low density gas often found glowing faintly on either side of an AGN.






30. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






31. A streak of light in the atmosphere






32. Centered on the Earth






33. Mercury






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






35. Venus (retrograde)






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






37. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






38. A star fusing hydrogen to helium in it's core






39. Possible Fates of the Universe






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






42. The oldest part of the Milky Way






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






44. The source of the force that is accelerating the expansion rate of the universe.






45. Titan






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






47. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






48. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






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






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