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 technique using computer-controlled mirrors to sharpen images distorted by the atmosphere






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






3. 1 mm 1μm






4. The place in the sky that the Earth's axis points toward (can be either north or south)






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






6. The projection of the Earth's equator onto the celestial sphere.






7. The seasonal shifting of a nearby star's position relative to more distant objects.






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






9. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






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






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






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






13. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.






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






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






16. What causes the zones and belts on jupiter and saturn?






17. 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)






18. Radiation given off by electrons accelerating in a magnetic field






19. Centered on the Earth






20. A younger cluster of stars - found in the galaxy disk






21. Orbit in Jupiters orbit






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






23. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.






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






25. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






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






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






28. 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.






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






30. Material that shoots rapidly out into space. Flares cause Auroras






31. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






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






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






34. The lowest energy of an atom.






35. A very dense - highly populated cluster of galaxies






36. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






37. The powdered stone fragments that make up the lunar 'soil'






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






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






40. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)






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






42. A small and dim but hot star.






43. Either Io -Europa - Ganymede - or Callisto






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






45. A small chunk of rock in space






46. 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:






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






48. The oldest part of the Milky Way






49. The rock that makes up the lunar highlands






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