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






2. The shadow behind the Earth or Moon where the Sun is partially obscured.






3. 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






4. Saturn






5. The displacement of spectral lines to redder colors caused by the expansion of the universe.






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






7. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






8. 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.






9. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






10. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






11. A perfect absorber and radiator of electromagnetic radiation.






12. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






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






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






15. A small and dim but hot star.






16. The area behind a lens where images are resolved






17. The lens in a telescope used to determine the magnification






18. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






19. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






20. Why does the earth have few craters while the moon has many?






21. The projection of the Earth's equator onto the celestial sphere.






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






23. The force of attraction between any two objects having mass






24. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






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






26. A star that blows itself apart






27. An evolved star - past the helium flash that is burning helium to carbon in it's cores






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






29. 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.






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






31. The projection of the Earth's equator onto the celestial sphere.






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






33. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






34. Half of the longest diameter across an ellipse






35. A spinning neutron star






36. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






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






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






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






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






41. 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)






42. A quantity measuring the stability of the Earth's atmosphere






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






44. The gap etween saturn's A and B rings






45. 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.






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






47. The science of measuring light energy by wavelength.






48. Either Io -Europa - Ganymede - or Callisto






49. The process of acquiring material






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