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. Jupiter






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






3. The gap etween saturn's A and B rings






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






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






6. 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






7. Half of the longest diameter across an ellipse






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






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

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






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






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






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






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






15. The crust of a meteorite caused by its entry into Earth's atmosphere






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






17. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






18. Any change in the speed or direction of an object's motion






19. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






20. Approximate speed of light in a vacuum






21. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






22. Material that shoots rapidly out into space. Flares cause Auroras






23. A telescope that uses lenses to focus light






24. A planet that is farther from the sun than the Earth is






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






26. 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)






27. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






28. The rate of expansion of the universe.






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






30. An object that may remain after a star explodes






31. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






32. The equation that describes how matter equates with energy






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






34. 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






35. A star that erratically and explosively brightens and dims






36. Mercury






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






38. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






39. The location around an atom where an electron resides.






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






41. A term referring to Jupiter-like planets






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






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






44. Centered on the sun.






45. 10 nm 10^2 nm






46. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






47. The surface of the sun






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






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






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