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






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






3. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






4. Mercury - Venus - Earth - Mars






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






6. The process of acquiring material






7. A streak of light in the atmosphere






8. Mercury and venus






9. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






10. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






11. 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






12. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






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






14. Ganymede and Titan






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






16. Matter that reveals itself only through its gravitational attraction






17. Electromagnetic Radiation






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






19. A particle of light






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






21. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






22. The powdered stone fragments that make up the lunar 'soil'






23. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






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






25. Jupiter - Saturn - Uranus - Neptune






26. Light-colored high-pressure bands in Jupiter's atmosphere






27. The telescope configuration that has the focus placed at the back of the primary mirror






28. A measure of the ability of a telescope to see fine detail






29. Orbit in Jupiters orbit






30. Titan






31. The location in the Milky Way where stars orbit like a solid wheel






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






33. 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)






34. Saturn






35. A galaxy sending out a stream of material from its nucleus






36. A small spherical dark nebula






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






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






40. The mirror that determines the focus configuration of a reflector






41. 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)






42. The point directly overhead.






43. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






44. The distance light travels in one year (=9.46x10^12km).






45. Stars orvits do not define the spiral patterns - instead they are density waves that move at slower speeds (arms are defined by young O and B stars and gas clouds)






46. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






47. A star that erratically and explosively brightens and dims






48. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






49. A subatomic particle with a negative charge. It creates light.






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