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. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






2. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






3. The high- temperatature outer layer of the sun






4. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






5. The slow wobble of the Earth on its rotation axis.






6. A quantity measuring the stability of the Earth's atmosphere






7. When massive objects bend space and time enough to create multiple images of an object located behind them






8. Centered on the Earth






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






10. A telescope that uses mirrors to focus light






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






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






13. The study of the universe as a whole.






14. A massive variable star used to find distances to the galaxies or clusters that contain them.






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






16. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






17. First accurately measured the speed of light in a vacuum






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






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






20. The elementary building blocks from which protons and neutrons are formed.






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






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






23. A small and dim but hot star.






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






25. A term referring to Jupiter-like planets






26. 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.






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. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






29. Mercury






30. A particle of light.






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






32. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






33. The entity responsible for spiral arms in grand-design spiral galaxies






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






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. When the Sun is farthest south of the celestial equator (About December 22)






37. The gap inthe outer portion of Saturn's A ring






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

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

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






41. The rate of expansion of the universe.






42. Mercury






43. 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






44. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






45. 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.






46. A force exerted by reflecting sunlight






47. 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






48. A word used in astronomy to describe all elements besides hydrogen and helium






49. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






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