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






2. A high-pressure bulge in Neptune's southern hemisphere






3. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






4. Collections of young - hot stars






5. The mirror that gathers the light in a reflector






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






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






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






9. An object that may remain after a star explodes






10. Elliptical orbits that come inside orbit of the Earth.






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






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






13. The apparent path of the Sun through the stars on the celestial sphere.






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






15. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






16. A particle of light.






17. 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.






18. Matter that reveals itself only through its gravitational attraction






19. A small spherical dark nebula






20. Jupiter






21. Moon in less than the angular diameter of the Sun.






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






23. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






24. 10 nm 10^2 nm






25. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






26. A two-filter measure of the color - and hence temperature - of a star.






27. A prominence seen against the disk of the sun






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






29. The process of acquiring material






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






31. The gap etween saturn's A and B rings






32. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






33. A planet orbiting about a distant star






34. Venus






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






36. Electromagnetic Radiation






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






38. 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)






39. 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






40. The mix of pure photon energy that emerged at the start of the universe.






41. 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 ________.






42. What are the three possible geometries of the universe?






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






44. Hot cells of gas that rise and fall in the hotosphere






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






46. Hydrogen and helium (mainly)






47. 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.






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






49. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






50. A long-lived high-pressure bulge in Jupiter's southern hemisphere