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. 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)






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






3. The law that predicts the possible types of spectra.

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4. A huge sphere of tenuous gas surrounding the nucleus of a comet






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






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






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






8. The average distance between the Earth and the Sun (=1.5 x10^8km)






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






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






11. Jupiter






12. A small chunk of rock in space






13. Half of the longest diameter across an ellipse






14. The measure of a variable star's apparent magnitude as it brightens and dims with time






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






16. A word meaning 'the same in all directions.'






17. A large and bright but cool star.






18. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






19. The mirror that gathers the light in a reflector






20. 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.






21. 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






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






23. A star that is in the process of forming. It glows from gravitational contraction






24. A small spherical dark nebula






25. The lowest energy of an atom.






26. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






27. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






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






29. 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)






30. 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)






31. A crystalline patter found in iron meteorites






32. The sinking of denser elements to the center of a young molten planet






33. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.






34. Collections of young - hot stars






35. The process responsible for creating the arms of flocculent spiral galaxies






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






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






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






39. Light scattered through the atmosphere that degrades astronomical images






40. The rock that makes up the lunar highlands






41. 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)






42. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere






43. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






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






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






46. The process responsible for creating the arms of flocculent spiral galaxies






47. A star fusing hydrogen to helium in it's core






48. The place in the sky that the Earth's axis points toward (can be either north or south)






49. Matter so dense that even light cannot escape its gravity






50. 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.