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






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






3. A galaxy emitting large amounts of energy at long wavelengths.






4. What causes the zones and belts on jupiter and saturn?






5. The study of the universe as a whole.






6. 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.






7. Titan






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






9. 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)






10. 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






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






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






13. Saturn






14. 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






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






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






17. A location on an H-are Diagram where evolving stars pulsate






18. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






19. 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






20. The high- temperatature outer layer of the sun






21. Electromagnetic Radiation






22. 10 cm -> 1 mm






23. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






24. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






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






26. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






27. The wavelengths where a specific element can absorb or emit light.






28. A star fusing hydrogen to helium in it's core






29. 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






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






31. The projection of the Earth's equator onto the celestial sphere.






32. Ganymede






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






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






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






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






37. Jupiter






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






39. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






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






41. The lowest energy of an atom.






42. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






43. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation






44. An object that may remain after a star explodes






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






46. A telescope that uses mirrors to focus light






47. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






48. A star that is burning hydrogen to helium in a shell surrounding it's core






49. When particles are compressed to an unnatural state where their pressure is not related to their temperature






50. The displacement of spectral lines to redder colors caused by the expansion of the universe.