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. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






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






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






4. The oldest grouping of stars - found in the galaxy halo






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






6. What Ole Roemer used to measure the speed of light in a vacuum






7. When the Sun is farthest north of the celestial equator (about June 22)






8. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting






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






10. The dimming of starlight by intervening dust






11. 10 cm -> 1 mm






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






13. The mirror that gathers the light in a reflector






14. A push or a pull






15. An energetic event taking place in the early universe






16. 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






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






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






19. A small chunk of rock in space






20. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






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






22. A perfect absorber and radiator of electromagnetic radiation.






23. Why does the earth have few craters while the moon has many?






24. Mercury and venus






25. The act of removing an electron from an atom.






26. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






27. The layer of the sun just above the photosphere






28. The amount an image is enlarged by a telescope






29. Earth






30. Small moons that maintain the shape of rings around Saturn and Uranus






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






32. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






33. A push or a pull






34. The rotation period of the Earth measured relative to the stars.






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






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






37. An evolved star - past the helium flash that is burning helium to carbon in it's cores






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






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






40. The larger bodies that formed early in teh solar nebula that were chemically differentiated






41. Ganymede and Titan






42. A star without enough mass to begin hydrogen fusion






43. 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)






44. The force of attraction between any two objects having mass






45. 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.






46. Mercury and venus






47. An element of a highly efficient - two-dimensional electronic light detector






48. The process similar to conduction by which energy moves from the solar core to the convective layer






49. Where is the center of the expansion






50. The part of the Milky way that has on-going star formation







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