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






2. 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






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






4. The law that describes the blackbody curve - and let to quantum mechanics.

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






6. 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






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






8. 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






9. A word used in astronomy to describe all elements besides hydrogen and helium






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






11. Earth






12. A planet that is closer to the sun than the earth






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






14. The part of the Milky way that has on-going star formation






15. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






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






17. When a planet lines up with the sun inthe sky






18. A rock or iron specimen that has fallen from space






19. Jupiter






20. A term referring to the orbital character of stars near the Sun






21. 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.






22. 100 nm 10 nm






23. 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






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






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






26. 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)






27. Jupiter - Saturn - Uranus - Neptune






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






29. The dimming of starlight by intervening dust






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






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






32. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






33. A logarithmically scaled value for the measured brightness of a star.






34. The point directly overhead.






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






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






37. A bright area of higher temperature that often proceeds the formation of sunspots.






38. The source of the force that is accelerating the expansion rate of the universe.






39. 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.






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






41. A plot of star absolute magnitude verses spectral type.






42. Titan






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






44. 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






45. A force exerted by reflecting sunlight






46. Is there water on the moon?






47. All possible types of energy that can be emitted and absorbed by atoms.






48. IO






49. The organization of clusters of galaxies into sheets and strings






50. Light scattered through the atmosphere that degrades astronomical images