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. 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.






2. Jupiter






3. Matter so dense that even light cannot escape its gravity






4. Half of the longest diameter across an ellipse






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






6. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






7. The rock that makes up the lunar highlands






8. A small spherical dark nebula






9. Large nebula consisting of very cold gas and dust






10. The rotation period of the Earth measured relative to the stars.






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






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






13. The amount an image is enlarged by a telescope






14. The larger bodies that formed early in teh solar nebula that were chemically differentiated






15. The material from which the solar system formed






16. Hot cells of gas that rise and fall in the hotosphere






17. 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






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






19. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






20. A distance measure determined by the shifting of a star against the background sky every 6 months.






21. 10 nm 10^2 nm






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

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23. Saturn






24. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






25. 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.






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






27. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






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






29. Jupiter






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






31. A bridge of material held in position above the solar surface. They can remain for hours even days






32. The lowest energy of an atom.






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. Earth






35. Sc galaxies






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






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






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






39. A star that erratically and explosively brightens and dims






40. A word used in astronomy to describe all elements besides hydrogen and helium






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






42. Hydrogen and helium (mainly)






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






44. A huge sphere of tenuous gas surrounding the nucleus of a comet






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






46. The high- temperatature outer layer of the sun






47. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






48. Approximate speed of light in a vacuum






49. 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






50. The apparent path of the Sun through the stars on the celestial sphere.