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. 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)






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






3. The science of measuring light energy by wavelength.






4. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






5. Is there water on the moon?






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






7. The point in its orbit where a planet is nearest the sun






8. Ganymede






9. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






10. Mercury and venus






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






12. 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.






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






14. A distance measure determined by the shifting of a star against the background sky every 6 months.






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






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






17. Form honeycomb like patterns surrounding empty or nearly empty voids.






18. A younger cluster of stars - found in the galaxy disk






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






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






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






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






23. A representation of the changes in color and brightness of an evolving protostar.






24. 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.






25. Is space infinitely large?

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26. Centered on the sun.






27. Earth






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






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






30. The entity responsible for spiral arms in grand-design spiral galaxies






31. First accurately measured the speed of light in a vacuum






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






33. An object that may remain after a star explodes






34. A small round distribution of gas surrounding a dying star






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






36. Saturn






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






38. What Ole Roemer used to measure the speed of light in a vacuum






39. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






40. When one side of a body always faces the planet it revolves around






41. The layer of the sun just above the photosphere






42. 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)






43. 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)






44. The dimming of starlight by intervening dust






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






46. A telescope that uses mirrors to focus light






47. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.






48. The slow wobble of the Earth on its rotation axis.






49. A star without enough mass to begin hydrogen fusion






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