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. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






2. 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.






3. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE






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






5. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






6. The dark - relativley smooth areas on the moon; Latin for sea






7. The dimming of starlight by intervening dust






8. The location of a supermassive black hole






9. The surface of the sun






10. Sc galaxies






11. Heavier elements such as iron - silicon - magnesium - sulfer - nickel






12. 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






13. The rotation of a star or planet at different speeds at its equator and poles






14. The apparent backward motion of a planet against the background of stars.






15. Neptune or uranus






16. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






17. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






18. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






19. A star that erratically and explosively brightens and dims






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






21. A term referring to Earth-like planets






22. A word meaning 'the same everywhere throughout.'






23. 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)






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






25. The sinking of denser elements to the center of a young molten planet






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






27. Ganymede and Titan






28. The science of measuring light energy by wavelength.






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






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






31. The average distance between the Earth and the Sun (=1.5 x10^8km)






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






33. The process that powers the sun and hydrogen bombs






34. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






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






36. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






37. An empirical scheme for predictin ghe orbital distances of planets






38. Venus (retrograde)






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






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






41. Jupiter






42. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






43. A small chunk of rock in space






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






45. 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.






46. 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.






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






48. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






49. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






50. Possible Fates of the Universe







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