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. All wavelengths of light emitted by a blackbody.






2. VENUS






3. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






4. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






5. Ganymede and Titan






6. Clouds of low density gas often found glowing faintly on either side of an AGN.






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






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






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






10. Jupiter






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






12. The science of measuring light energy by wavelength.






13. A spectrum of light with energy at only a few wavelengths.






14. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






15. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






16. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






17. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






18. 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.






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






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






21. Centered on the sun.






22. 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.






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






24. Collections of young - hot stars






25. The larger bodies that formed early in teh solar nebula that were chemically differentiated






26. A star that blows itself apart






27. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






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






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






30. 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






31. A force exerted by reflecting sunlight






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






33. 10 nm 10^2 nm






34. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






35. Matter that reveals itself only through its gravitational attraction.






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






37. A particle of light






38. When the Sun is farthest north of the celestial equator (about June 22)






39. The crust of a meteorite caused by its entry into Earth's atmosphere






40. A quantity measuring the stability of the Earth's atmosphere






41. Any class of objects with a uniform luminosity used to determine distance.






42. 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)






43. Orbit in Jupiters orbit






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






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






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






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






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






49. Mercury






50. The dimming of starlight by intervening dust