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 particle of light






2. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






3. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






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






5. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






6. When particles are compressed to an unnatural state where their pressure is not related to their temperature






7. 1 mm 1μm






8. 1μm 100 nm






9. A particle of light.






10. Small moons that maintain the shape of rings around Saturn and Uranus






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






12. The process that powers the sun and hydrogen bombs






13. The relation that tells how light dims with distance.






14. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






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






16. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






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






18. A long-lived high-pressure bulge in Jupiter's southern hemisphere






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






20. 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:






21. Dark - reddish - low-pressure bands in Jupiter's atmosphere






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






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

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24. Is space infinitely large?

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25. A telescope that uses lenses to focus light






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






27. The telescope configuration that has the focus placed at the back of the primary mirror






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






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






30. The wavelengths where a specific element can absorb or emit light.






31. A rock or iron specimen that has fallen from space






32. A small spherical dark nebula






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






34. A representation of the changes in color and brightness of an evolving protostar.






35. 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)






36. The point directly overhead.






37. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






38. The rotation period of the Earth measured relative to the Sun.






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






40. A star that blows itself apart






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






42. In what chemical form are jupiters nitrogen - carbon and oxygen?






43. The rate of expansion of the universe.






44. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






45. A star that is burning hydrogen to helium in a shell surrounding it's core






46. A phenomenon seen when the Earth passes through the orbit of a burned out comet






47. The mass of an object divided by its volume






48. When the Moon entirely blocks the Sun.






49. The lowest energy of an atom.






50. A collection of galaxies like the one the Milky Way belongs to







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