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. Mercury and venus






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






3. A star without enough mass to begin hydrogen fusion






4. A small chunk of rock in space






5. Material that shoots rapidly out into space. Flares cause Auroras






6. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






7. Mercury






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






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






10. 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






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






12. The gap inthe outer portion of Saturn's A ring






13. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






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






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






16. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






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






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






19. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






20. The location of a supermassive black hole






21. 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






22. What do we think the actual fate of the universe will be and why do we think this?






23. 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 ________.






24. A measure of the force of gravity on an object






25. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






26. The movement of the Earth's crustal plates riding on top of the mantle.






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






28. 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






29. What is the universe expanding into?






30. A small and dim but hot star.






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






32. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






33. The gap inthe outer portion of Saturn's A ring






34. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






35. The temp at which a substance in the vacuum of space solidifies






36. All wavelengths of light emitted by a blackbody.






37. 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.






38. A push or a pull






39. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






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






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






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






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






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






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






46. An object that may remain after a star explodes






47. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






48. Mercury






49. 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






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