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. An object that may remain after a star explodes






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






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






4. When the Sun is farthest north of the celestial equator (about June 22)






5. When massive objects bend space and time enough to create multiple images of an object located behind them






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






7. A high-pressure bulge in Neptune's southern hemisphere






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






9. A perfect absorber and radiator of electromagnetic radiation.






10. Is there water on the moon?






11. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






12. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






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






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






15. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






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






17. Mercury and venus






18. The temp at which a substance in the vacuum of space solidifies






19. A word used in astronomy to describe all elements besides hydrogen and helium






20. Venus (retrograde)






21. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






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






23. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.

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24. Collections of young - hot stars






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






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






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






28. The process responsible for creating the arms of flocculent spiral galaxies






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






30. Electromagnetic Radiation






31. 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.






32. 10 nm 10^2 nm






33. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






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






35. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






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






37. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






38. IO






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






40. Venus (retrograde)






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






42. Jupiter






43. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.






44. A term referring to Jupiter-like planets






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






46. Is space infinitely large?

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47. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






48. A location on an H-are Diagram where evolving stars pulsate






49. 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)






50. Europa