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. 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






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






3. An entity that is likely in the nucleus of most - if not all - galaxies.






4. The area behind a lens where images are resolved






5. Elliptical orbits that come inside orbit of the Earth.






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






7. A spread of light with an uninterrupted wavelength distribution of energy.






8. 10 cm -> 1 mm






9. A spectrum of light with energy at only a few wavelengths.






10. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






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






12. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)






13. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






14. A force exerted by reflecting sunlight






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






16. The rock that makes up the lunar maria






17. The mix of pure photon energy that emerged at the start of the universe.






18. The number of protons in an atom.






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






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






21. Centered on the sun.






22. The mirror that gathers the light in a reflector






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






24. A method of finding a star's distance from its absolute magnitude and spectral type or color.






25. A two-filter measure of the color - and hence temperature - of a star.






26. The displacement of spectral lines to redder colors caused by the expansion of the universe.






27. The process that powers the sun and hydrogen bombs






28. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






29. The process similar to conduction by which energy moves from the solar core to the convective layer






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






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

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






33. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






34. 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.






35. 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






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






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






38. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






39. The layer of the sun just above the photosphere






40. The wavelengths where a specific element can absorb or emit light.






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






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






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






44. 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






45. Infinitely long -> 10 cm






46. When particles are compressed to an unnatural state where their pressure is not related to their temperature






47. 10 cm -> 1 mm






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






49. 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.






50. Mercury






Can you answer 50 questions in 15 minutes?



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