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. Is space infinitely large?

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






3. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






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






5. A star without enough mass to begin hydrogen fusion






6. Form honeycomb like patterns surrounding empty or nearly empty voids.






7. A star that is burning hydrogen to helium in a shell surrounding it's core






8. The source of the force that is accelerating the expansion rate of the universe.






9. A long-lived high-pressure bulge in Jupiter's southern hemisphere






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

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






12. Where is the center of the expansion






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






14. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






15. The material from which the solar system formed






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






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






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






19. IO






20. The high- temperatature outer layer of the sun






21. The temp at which a substance in the vacuum of space solidifies






22. 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)






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






24. 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.






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






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






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






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






29. The imaginary sphere centered on the Earth that hols the stars.






30. A perfect absorber and radiator of electromagnetic radiation.






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






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






33. 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.






34. A volume of space where few - if any - galaxies are located






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






36. A bright area of higher temperature that often proceeds the formation of sunspots.






37. 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.






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






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






40. A faint - remarkably uniform distribution of radiation in space






41. 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)






42. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






43. Dark areas on the sun that are cooler than the surrounding photosphere






44. The point directly overhead.






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






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






47. How did Earth come to have an oxygen rich atmosphere?






48. The law that describes the blackbody curve - and let to quantum mechanics.

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49. A galaxy emitting large amounts of energy at long wavelengths.






50. 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.







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Can you answer 50 questions in 15 minutes?


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