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. Sc galaxies






2. Form honeycomb like patterns surrounding empty or nearly empty voids.






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






4. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






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






6. Light scattered through the atmosphere that degrades astronomical images






7. A star that erratically and explosively brightens and dims






8. 10 cm -> 1 mm






9. The distance a moon can be from a planet before shattering from tidal forces






10. The entity responsible for spiral arms in grand-design spiral galaxies






11. The area behind a lens where images are resolved






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






13. The mass of an object divided by its volume






14. Either Io -Europa - Ganymede - or Callisto






15. The gap inthe outer portion of Saturn's A ring






16. A plot of star absolute magnitude verses spectral type.






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






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






19. The process similar to conduction by which energy moves from the solar core to the convective layer






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






21. First accurately measured the speed of light in a vacuum






22. The first rock-sized bodies that formed in the solar nebula from dust grains






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






24. 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:






25. The high- temperatature outer layer of the sun






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






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






28. The law stating that hotter blackbodies look bluer than cooler blackbodies.

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






30. 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.






31. Jupiter - Saturn - Uranus - Neptune






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






33. Orbit in Jupiters orbit






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






35. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.






36. The oldest part of the Milky Way






37. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






38. A spinning neutron star






39. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






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






41. When the Moon entirely blocks the Sun.






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






43. Dark areas on the sun that are cooler than the surrounding photosphere






44. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






45. The rate of expansion of the universe.






46. Why do Galaxies move very rapidly in the interiors of the dense clusters?






47. Is space infinitely large?

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






49. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






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