Test your basic knowledge |

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






2. A term referring to the orbital character of stars near the Sun






3. A small spherical dark nebula






4. A small spherical dark nebula






5. The study of the universe as a whole.






6. 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.






7. Is there water on the moon?






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






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






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






11. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE






12. The oldest grouping of stars - found in the galaxy halo






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






14. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years






15. The surface of the sun






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






17. Mercury and venus






18. Very center of galaxy. suggestion of a black hole






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






20. The shadow behind the Earth or Moon where the Sun is partially obscured.






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






22. The relation that tells how light dims with distance.






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






24. Neptune or uranus






25. The distance light travels in one year (=9.46x10^12km).






26. The amount an image is enlarged by a telescope






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






28. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.






29. When the Sun moves from south to north across the celestial equator (about March 21)






30. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






31. A perfect absorber and radiator of electromagnetic radiation.






32. The point in its orbit where a planet is nearest the sun






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






34. IO






35. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






36. A planet that is farther from the sun than the Earth is






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






38. The law that predicts the possible types of spectra.

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39. A term referring to Jupiter-like planets






40. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR






41. The lens that gathers the light in a refractor






42. 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






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






44. 10 cm -> 1 mm






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






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






47. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






48. Light-colored high-pressure bands in Jupiter's atmosphere






49. 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)






50. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t