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 imaginary sphere centered on the Earth that hols the stars.






2. 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






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






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






5. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.






6. The state of having a balance between inflowing and outflowing heat-- the temp at every radial point is different but constant






7. Infinitely long -> 10 cm






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






9. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






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






11. A particle of light.






12. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






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






14. A small spherical dark nebula






15. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






16. 100 nm 10 nm






17. Elliptical orbits that come inside orbit of the Earth.






18. A particle of light






19. Centered on the Earth






20. All possible types of energy that can be emitted and absorbed by atoms.






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






22. When the Sun moves from south to north across the celestial equator (about March 21)






23. 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.






24. The process that powers the sun and hydrogen bombs






25. The apparent backward motion of a planet against the background of stars.






26. A rock or iron specimen that has fallen from space






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






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






29. A small and dim but hot star.






30. A volume of space where few - if any - galaxies are located






31. An element of a highly efficient - two-dimensional electronic light detector






32. A perfect absorber and radiator of electromagnetic radiation.






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






34. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






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






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






37. All possible types of energy that can be emitted and absorbed by atoms.






38. When a planet lines up with the sun inthe sky






39. The wavelengths where a specific element can absorb or emit light.






40. The layer of the sun just above the photosphere






41. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

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42. A term referring to Jupiter-like planets






43. 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






44. Light-colored high-pressure bands in Jupiter's atmosphere






45. An entity that is likely in the nucleus of most - if not all - galaxies.






46. Venus






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






48. 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.






49. The movement of the Earth's crustal plates riding on top of the mantle.






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