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






2. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






3. Jupiter






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






5. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






6. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






7. 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:






8. The apparent backward motion of a planet against the background of stars.






9. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






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






11. 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.






12. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies






13. Orbit in Jupiters orbit






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






15. A collection of galaxies like the one the Milky Way belongs to






16. Radiation given off by electrons accelerating in a magnetic field






17. A location on an H-are Diagram where evolving stars pulsate






18. 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.






19. A high-pressure bulge in Neptune's southern hemisphere






20. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






21. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






22. A phenomenon seen when the Earth passes through the orbit of a burned out comet






23. Light scattered through the atmosphere that degrades astronomical images






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






25. A push or a pull






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






27. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.






28. An important quality of telescopes that increases as the square of the primary mirror or objective lens






29. A star that erratically and explosively brightens and dims






30. The oldest terrain on the moon






31. A small chunk of rock in space






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






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

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






35. That which is responsible for Jupiter's magnetic field






36. 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 _____.






37. A galaxy sending out a stream of material from its nucleus






38. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






39. The light produced when particles from the sun collide with atmospheric molecules






40. The process that powers the sun and hydrogen bombs






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






42. A continuous spectrum of light missing energy at a few wave lengths.






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






44. The lens that gathers the light in a refractor






45. What is the universe expanding into?






46. 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)






47. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






48. 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






49. The shadow area behind the Earth or Moon where the Sun is completely obscured.






50. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.







Sorry!:) No result found.

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