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. The relation that tells how light dims with distance.






2. The name for the only seriously considered theory of the universe.






3. Venus






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






5. Venus (retrograde)






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






7. Any change in the speed or direction of an object's motion






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






9. A small round distribution of gas surrounding a dying star






10. 10 cm -> 1 mm






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






12. The number of protons in an atom.






13. An element of a highly efficient - two-dimensional electronic light detector






14. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






15. The most mass a white dwarf can have before collapsing to a neutron star






16. Matter that reveals itself only through its gravitational attraction






17. Where is the center of the expansion






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






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






20. The mirror that gathers the light in a reflector






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






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






23. A force exerted by reflecting sunlight






24. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






25. A planet that is closer to the sun than the earth






26. IO






27. The mass of an object divided by its volume






28. The lens that gathers the light in a refractor






29. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






30. The family of radiant energy that includes light as a subset






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






32. A particle of light.






33. 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:






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






35. The oldest part of the Milky Way






36. An object that may remain after a star explodes






37. A fusion process in which protons build together to form helium






38. How is the Hubble Law consistent with an expanding universe?






39. 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)






40. A galaxy emitting large amounts of energy at long wavelengths.






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






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






43. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






44. Collections of young - hot stars






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






46. 1μm 100 nm






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






48. The part of the Milky way that has on-going star formation






49. The area behind a lens where images are resolved






50. A faint - remarkably uniform distribution of radiation in space