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






2. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






3. The law that syas light energy from a blackbody increases as (temperature^4)






4. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






5. A force exerted by reflecting sunlight






6. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






7. Radiation given off by electrons accelerating in a magnetic field






8. The science of measuring light energy by wavelength.






9. 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.






10. The material from which the solar system formed






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

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12. A long-lived high-pressure bulge in Jupiter's southern hemisphere






13. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






14. Either Io -Europa - Ganymede - or Callisto






15. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






16. Ganymede and Titan






17. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






18. 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






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






20. Where is the center of the expansion






21. Electromagnetic Radiation






22. A subatomic particle with a negative charge. It creates light.






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






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






25. A long-lived high-pressure bulge in Jupiter's southern hemisphere






26. Orbit in Jupiters orbit






27. The lens that gathers the light in a refractor






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






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






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. The lowest energy of an atom.






32. Jupiter






33. A point in the sky where meteors appear to come from during a shower






34. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






35. What causes the zones and belts on jupiter and saturn?






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






37. The projection of the Earth's equator onto the celestial sphere.






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






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






40. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






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






42. 10^2 nm 10^7 nm






43. A star without enough mass to begin hydrogen fusion






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






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






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






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






48. Dark areas on the sun that are cooler than the surrounding photosphere






49. The rock that makes up the lunar highlands






50. When material is heated and moves taking the heat energy with it