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






2. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






3. 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 ________.






4. 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






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






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






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






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






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






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






11. A star that blows itself apart






12. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.






13. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






14. The location in the Milky Way where stars orbit like a solid wheel






15. A telescope that uses lenses to focus light






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






17. The distance between a lens and its focal plane






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






19. A location on an H-are Diagram where evolving stars pulsate






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






21. Hydrogen and helium (mainly)






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






23. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.






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






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






26. 10^2 nm 10^7 nm






27. 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.






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






29. Possible Fates of the Universe






30. 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






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






32. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






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






34. Matter so dense that even light cannot escape its gravity






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






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






37. The lens that gathers the light in a refractor






38. The normal eastward movement of a planet against the background of hte distant stars.






39. Largest moon in solar system - two differenet types of terrain - darker terrain is older - NOT ACTIVE SURFACE






40. The study of the universe as a whole.






41. Mercury






42. The mirror that determines the focus configuration of a reflector






43. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






44. A galaxy sending out a stream of material from its nucleus






45. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






46. The process of acquiring material






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






48. Half of the longest diameter across an ellipse






49. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)






50. A star that is in the process of forming. It glows from gravitational contraction