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 final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.






2. What Ole Roemer used to measure the speed of light in a vacuum






3. A particle of light






4. Any change in the speed or direction of an object's motion






5. The part of the Milky way that has on-going star formation






6. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






7. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






8. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






9. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






10. Any class of objects with a uniform luminosity used to determine distance.






11. A push or a pull






12. 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






13. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






14. Light scattered through the atmosphere that degrades astronomical images






15. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






16. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






17. A point in the sky where meteors appear to come from during a shower






18. A bright area of higher temperature that often proceeds the formation of sunspots.






19. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years






20. Ganymede






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






22. The study of the universe as a whole.






23. A prominence seen against the disk of the sun






24. Thick rigid crust - no longer has plate tectonics but still has convective hot spots that create earth-like volcanoes except that last for billions of years because of lack of tectonics.






25. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






26. Where is the center of the expansion






27. The gap inthe outer portion of Saturn's A ring






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






29. Poitns of gravitational stability in the orbit of a planet






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






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






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






33. A two-filter measure of the color - and hence temperature - of a star.






34. The location of a supermassive black hole






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 material from which the solar system formed






37. Neptune or uranus






38. Mercury






39. The gap inthe outer portion of Saturn's A ring






40. Ganymede and Titan






41. The high- temperatature outer layer of the sun






42. Earth






43. The process that powers the sun and hydrogen bombs






44. The number of protons in an atom.






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






46. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






47. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






48. The oldest grouping of stars - found in the galaxy halo






49. Ganymede and Titan






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