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 huge sphere of tenuous gas surrounding the nucleus of a comet






2. 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






3. A fusion process in which protons build together to form helium






4. 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.






5. The amount an image is enlarged by a telescope






6. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






7. A change in the appearance of the sun at the edge of the solar disk






8. 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






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






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






11. Finding a star's absolute magnitude from it's placement on an HR diagram. After finding the absolute magnitude - we measure the apparent magnitude - for a distance modulus and use this to find the distance. This method is good for finding distances t






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






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






14. The crust of a meteorite caused by its entry into Earth's atmosphere






15. What is the universe expanding into?






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






17. The point in its orbit where a planet is farthest from the sun






18. A word meaning 'the same in all directions.'






19. The science of measuring light energy by wavelength.






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






21. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






22. Saturn






23. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






24. The oldest terrain on the moon






25. A star that blows itself apart






26. 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)






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






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






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






30. 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






31. Rich= dense crowded cores of galaxies - poor= few members and a looser organization of galaxies






32. A repeated - periodic push or pull capable of summing into a larger push or pull






33. 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)






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






35. 1μm 100 nm






36. When massive objects bend space and time enough to create multiple images of an object located behind them






37. A large and bright but cool star.






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






39. A particle of light






40. Then the Sun moves from north to south across the celestial equator (about September 23)






41. 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)






42. 10 nm 10^2 nm






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






44. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






45. The dimming of starlight by intervening dust






46. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






47. 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.






48. The area behind a lens where images are resolved






49. The seasonal shifting of a nearby star's position relative to more distant objects.






50. A star that erratically and explosively brightens and dims