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

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






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






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






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






6. 1μm 100 nm






7. 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.






8. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






9. The process that powers the sun and hydrogen bombs






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






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






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






13. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






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






15. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






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






17. The Greek philosopher responsible for making the stellar magnitude scale.






18. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






19. A particle of light.






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






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






22. Approximate speed of light in a vacuum






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






24. The area behind a lens where images are resolved






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






26. When a planet lines up with the sun inthe sky






27. VENUS






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






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






30. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






31. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






32. The organization of clusters of galaxies into sheets and strings






33. What do we think the actual fate of the universe will be and why do we think this?






34. A change in the appearance of the sun at the edge of the solar disk






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






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






37. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






38. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.






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






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






41. When the Sun is farthest south of the celestial equator (About December 22)






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






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






44. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

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






46. An energetic event taking place in the early universe






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






48. The mirror that determines the focus configuration of a reflector






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






50. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.