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 faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






2. Moon in less than the angular diameter of the Sun.






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






4. Titan






5. A subatomic particle with a negative charge. It creates light.






6. 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:






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






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

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






10. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






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






12. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






13. A logarithmically scaled value for the measured brightness of a star.






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






15. The surface of the sun






16. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






17. IO






18. Neptune or uranus






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






20. The telescope configuration that has the focus placed at the back of the primary mirror






21. The first rock-sized bodies that formed in the solar nebula from dust grains






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






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






24. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






25. What Ole Roemer used to measure the speed of light in a vacuum






26. The rate of expansion of the universe.






27. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






28. A fusion process in which protons build together to form helium






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






30. The 'edge' of the universe. Light beyond this has not reached us yet.






31. What are the three possible geometries of the universe?






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






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






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






35. VENUS






36. Then the Sun moves from north to south across the celestial equator (about September 23)






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






38. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.






39. Infinitely long -> 10 cm






40. 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.






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






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






43. How is the Hubble Law consistent with an expanding universe?






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






45. The distance between a lens and its focal plane






46. The mirror that gathers the light in a reflector






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






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






49. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






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

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