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 lens in a telescope used to determine the magnification






2. An entity that is likely in the nucleus of most - if not all - galaxies.






3. Then the Sun moves from north to south across the celestial equator (about September 23)






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






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






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






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






8. 1 mm 1μm






9. The point in its orbit where a planet is farthest from the sun






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






11. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






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






13. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






14. A large and bright but cool star.






15. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






16. The rock that makes up the lunar highlands






17. 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.






18. 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.






19. Venus (retrograde)






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






21. The process that powers the sun and hydrogen bombs






22. 10^2 nm 10^7 nm






23. The area behind a lens where images are resolved






24. The fusion process that turns three helium nuclei into a carbon nucleus






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






26. 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)






27. An object that may remain after a star explodes






28. The relation that tells how light dims with distance.






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






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






31. 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.






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






33. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






34. Venus






35. 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.






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






37. The point in its orbit where a planet is farthest from the sun






38. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






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






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






41. The equation that describes how matter equates with energy






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






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






44. A push or a pull






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






46. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






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






48. The seasonal shifting of a nearby star's position relative to more distant objects.






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






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