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. 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)






2. Venus






3. Centered on the sun.






4. Jupiter






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






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






7. Loops that trace the magnetic field as it erupts from a sunspot area and arches over to an adjacent area. They glow in the light of gas pouring out of corona and falling into photosphere.






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






9. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.






10. When particles are compressed to an unnatural state where their pressure is not related to their temperature






11. Orbit in Jupiters orbit






12. 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.






13. VENUS






14. 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.






15. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






16. Long - meandering cliff formed when a planet surface cools and shrinks






17. A very distant - star-like object with huge - broad emission lines. Probably the nucleus of a distant active galaxy.






18. Radiation given off by electrons accelerating in a magnetic field






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






20. Matter that reveals itself only through its gravitational attraction






21. Atmosphere blocks high energy wavelengths - atmosphere blurs optical radiation - atmosphere absorbs some radiation at all wavelengths even when it gets through.






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






23. The study of the universe as a whole.






24. A star that is burning hydrogen to helium in a shell surrounding it's core






25. 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.






26. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






27. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






28. Ganymede






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






30. Jupiter






31. 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






32. 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)






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






34. Centered on the Earth






35. A streak of light in the atmosphere






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






37. Saturn






38. A very dense - highly populated cluster of galaxies






39. A logarithmically scaled value for the measured brightness of a star.






40. The area behind a lens where images are resolved






41. The oldest part of the Milky Way






42. That which is responsible for Jupiter's magnetic field






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






44. Jupiter






45. A distance measure determined by the shifting of a star against the background sky every 6 months.






46. What causes the zones and belts on jupiter and saturn?






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






48. All wavelengths of light emitted by a blackbody.






49. 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






50. The place in the sky that the Earth's axis points toward (can be either north or south)