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. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






2. 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)






3. Radiation given off by electrons accelerating in a magnetic field






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






5. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






6. The most mass a white dwarf can have before collapsing to a neutron star






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






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






9. A very dense - highly populated cluster of galaxies






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






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






12. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






13. A word meaning 'the same in all directions.'






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






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






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

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17. The normal eastward movement of a planet against the background of hte distant stars.






18. A rock or iron specimen that has fallen from space






19. 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.






20. A particle of light






21. 10^2 nm 10^7 nm






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






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






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






25. A star without enough mass to begin hydrogen fusion






26. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






27. 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.






28. 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






29. A point in the sky where meteors appear to come from during a shower






30. When the Moon entirely blocks the Sun.






31. A force exerted by reflecting sunlight






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






33. The Greek philosopher responsible for making the stellar magnitude scale.






34. 10 cm -> 1 mm






35. The location of a supermassive black hole






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






37. 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 ________.






38. The entity from which the whole universe is postulated to have come from.






39. Venus






40. When one side of a body always faces the planet it revolves around






41. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






42. The point directly overhead.






43. The mass of an object divided by its volume






44. That which is responsible for Jupiter's magnetic field






45. Venus






46. Ganymede






47. A distance measure determined by the shifting of a star against the background sky every 6 months.






48. A term referring to Earth-like planets






49. Jupiter






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