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 linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






2. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






3. A star fusing hydrogen to helium in it's core






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






5. 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:






6. Ganymede and Titan






7. The apparent path of the Sun through the stars on the celestial sphere.






8. A large and bright but cool star.






9. When the Moon entirely blocks the Sun.






10. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






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






12. Ganymede






13. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






14. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






15. The family of radiant energy that includes light as a subset






16. A change in the appearance of the sun at the edge of the solar disk






17. The amount an image is enlarged by a telescope






18. 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






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






20. A continuous spectrum of light missing energy at a few wave lengths.






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






22. An energetic event taking place in the early universe






23. 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:






24. 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.






25. A term referring to Earth-like planets






26. The shadow area behind the Earth or Moon where the Sun is completely obscured.






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






28. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






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






30. The high- temperatature outer layer of the sun






31. A streak of light in the atmosphere






32. The rock that makes up the lunar highlands






33. The oldest grouping of stars - found in the galaxy halo






34. 100 nm 10 nm






35. The force of attraction between any two objects having mass






36. Approximate speed of light in a vacuum






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






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






39. The lens in a telescope used to determine the magnification






40. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






41. 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.






42. The elementary building blocks from which protons and neutrons are formed.






43. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






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






45. The oldest terrain on the moon






46. When massive objects bend space and time enough to create multiple images of an object located behind them






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






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






49. A very dense - highly populated cluster of galaxies






50. Matter that reveals itself only through its gravitational attraction