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






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






3. Any class of objects with a uniform luminosity used to determine distance.






4. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






5. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






6. A small and dim but hot star.






7. 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






8. 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






9. 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.






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






11. The distance between a lens and its focal plane






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






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






14. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






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

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






17. The science of measuring light energy by wavelength.






18. The crust of a meteorite caused by its entry into Earth's atmosphere






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






20. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






21. The lowest energy of an atom.






22. The average distance between the Earth and the Sun (=1.5 x10^8km)






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






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






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






26. All possible types of energy that can be emitted and absorbed by atoms.






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






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






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






30. Venus






31. A word meaning 'the same everywhere throughout.'






32. Mercury






33. A measure of the ability of a telescope to see fine detail






34. Either Io -Europa - Ganymede - or Callisto






35. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






36. 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






37. The amount an image is enlarged by a telescope






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






39. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






40. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






41. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






42. What is the universe expanding into?






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






44. Collections of young - hot stars






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






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






47. 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






48. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






49. A push or a pull






50. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core