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 fate of the universe if it is closed. The universe expanding as much as possible and then retracting






2. 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)






3. Venus






4. Europa






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






6. 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)






7. The Greek philosopher responsible for making the stellar magnitude scale.






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






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






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






11. Dark - reddish - low-pressure bands in Jupiter's atmosphere






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






13. A galaxy emitting large amounts of energy at long wavelengths.






14. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






15. A force exerted by reflecting sunlight






16. 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)






17. Either Io -Europa - Ganymede - or Callisto






18. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






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






20. A repeated - periodic push or pull capable of summing into a larger push or pull






21. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years






22. 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)






23. The light produced when particles from the sun collide with atmospheric molecules






24. The rotation of a star or planet at different speeds at its equator and poles






25. 1 mm 1μm






26. 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.






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






28. A small and dim but hot star.






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






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






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






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






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






34. A star that is burning hydrogen to helium in a shell surrounding it's core






35. Earth






36. The layer of the sun just above the photosphere






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

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38. A fusion process in which protons build together to form helium






39. The oldest part of the Milky Way






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






41. The science of measuring light energy by wavelength.






42. Jupiter






43. Mercury






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






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






46. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






47. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






48. Long - meandering cliff formed when a planet surface cools and shrinks






49. Long - meandering cliff formed when a planet surface cools and shrinks






50. Poitns of gravitational stability in the orbit of a planet







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