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






2. The study of the universe as a whole.






3. Where is the center of the expansion






4. Sc galaxies






5. A word meaning 'the same everywhere throughout.'






6. Mercury and venus






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






8. IO






9. The number of protons in an atom.






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






11. The science of measuring light energy by wavelength.






12. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






13. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






14. Very center of galaxy. suggestion of a black hole






15. A huge sphere of tenuous gas surrounding the nucleus of a comet






16. Approximate speed of light in a vacuum






17. Mercury and venus






18. 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:






19. The fusion process that turns three helium nuclei into a carbon nucleus






20. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






21. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






22. The layer of the sun just above the photosphere






23. An important quality of telescopes that increases as the square of the primary mirror or objective lens






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






25. Jupiter






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






27. 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)






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






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






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. The distance a moon can be from a planet before shattering from tidal forces






32. 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






33. Either Io -Europa - Ganymede - or Callisto






34. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






35. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






36. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.






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






38. Collections of young - hot stars






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






40. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






41. 10 nm 10^2 nm






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






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






44. A spread of light with an uninterrupted wavelength distribution of energy.






45. Form honeycomb like patterns surrounding empty or nearly empty voids.






46. The science of measuring light energy by wavelength.






47. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.






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






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






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







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