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 wavelengths where a specific element can absorb or emit light.






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






3. Mercury






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






5. The area behind a lens where images are resolved






6. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






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






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

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9. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






10. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






11. When the Moon entirely blocks the Sun.






12. A method of finding a star's distance from its absolute magnitude and spectral type or color.






13. The number of protons in an atom.






14. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






15. 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)






16. A small spherical dark nebula






17. 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






18. A planet that is farther from the sun than the Earth is






19. The gap inthe outer portion of Saturn's A ring






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






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






22. In what chemical form are jupiters nitrogen - carbon and oxygen?






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






24. A measure of the force of gravity on an object






25. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






26. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.

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27. The north-south line passing directly overhead through the zenith.






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






29. Where is the center of the expansion






30. Matter that reveals itself only through its gravitational attraction






31. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE






32. 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.






33. Centered on the Earth






34. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






35. A large and bright but cool star.






36. The location around an atom where an electron resides.






37. The mirror that determines the focus configuration of a reflector






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






39. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.






40. Then the Sun moves from north to south across the celestial equator (about September 23)






41. IO






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






43. A crystalline patter found in iron meteorites






44. The dimming of starlight by intervening dust






45. The dimming of starlight by intervening dust






46. Sudden blasts of gamma radiation from a very distant galaxy caused possibly by a supernova explosion.






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






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






49. How is the Hubble Law consistent with an expanding universe?






50. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.







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