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. Radiation given off by electrons accelerating in a magnetic field






2. The oldest part of the Milky Way






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






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






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






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






7. 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)






8. Is there water on the moon?






9. Dark - reddish - low-pressure bands in Jupiter's atmosphere






10. Titan






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






12. When the Moon entirely blocks the Sun.






13. 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.






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






15. 1 mm 1μm






16. A bridge of material held in position above the solar surface. They can remain for hours even days






17. The name for the only seriously considered theory of the universe.






18. A star that erratically and explosively brightens and dims






19. A term referring to Earth-like planets






20. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






21. The amount an image is enlarged by a telescope






22. The rotation period of the Earth measured relative to the stars.






23. A push or a pull






24. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






25. The entity responsible for spiral arms in grand-design spiral galaxies






26. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






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






28. The north-south line passing directly overhead through the zenith.






29. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






30. A method of finding a star's distance from its absolute magnitude and spectral type or color.






31. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






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






33. A small spherical dark nebula






34. The rotation period of the Earth measured relative to the Sun.






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






36. Collections of young - hot stars






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






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






39. First accurately measured the speed of light in a vacuum






40. 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 ________.






41. The 'edge' of the universe. Light beyond this has not reached us yet.






42. In what chemical form are jupiters nitrogen - carbon and oxygen?






43. The location of a supermassive black hole






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






45. When one side of a body always faces the planet it revolves around






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






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






48. The imaginary sphere centered on the Earth that hols the stars.






49. Ganymede and Titan






50. The point in its orbit where a planet is nearest the sun