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






2. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






3. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.






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






5. 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.






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






7. Why do Galaxies move very rapidly in the interiors of the dense clusters?






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






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






10. All wavelengths of light emitted by a blackbody.






11. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






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






13. A term referring to Earth-like planets






14. A planet that is farther from the sun than the Earth is






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






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






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






18. 10^2 nm 10^7 nm






19. Sc galaxies






20. A particle of light.






21. A term referring to the orbital character of stars near the Sun






22. The rock that makes up the lunar highlands






23. Earth






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






25. The mass of an object divided by its volume






26. 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






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






28. VENUS






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






30. The dark - relativley smooth areas on the moon; Latin for sea






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






32. The organization of clusters of galaxies into sheets and strings






33. What do we think the actual fate of the universe will be and why do we think this?






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






35. The law that predicts the possible types of spectra.

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36. The oldest terrain on the moon






37. Mercury






38. The rotation of a star or planet at different speeds at its equator and poles






39. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






40. Hurricane-like vortex in southern-hemisphere winds to north and south blow in opposite directions which keep it spinning and with no subsurface features like mountians it persists.






41. Infinitely long -> 10 cm






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






43. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






44. 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.






45. The lens that gathers the light in a refractor






46. A planet that is farther from the sun than the Earth is






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






48. The layer of the sun just above the photosphere






49. The area behind a lens where images are resolved






50. Heavier elements such as iron - silicon - magnesium - sulfer - nickel