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. Where is the center of the expansion






2. Light scattered through the atmosphere that degrades astronomical images






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






4. A perfect absorber and radiator of electromagnetic radiation.






5. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






6. 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.






7. Jupiter






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






9. VENUS






10. 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.






11. Electromagnetic Radiation






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






13. The mirror that gathers the light in a reflector






14. When material is heated and moves taking the heat energy with it






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






16. What is the universe expanding into?






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






18. An important quality of telescopes that increases as the square of the primary mirror or objective lens






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






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






21. A small round distribution of gas surrounding a dying star






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






23. A representation of the changes in color and brightness of an evolving protostar.






24. The measure of a variable star's apparent magnitude as it brightens and dims with time






25. The universe is isotropic - homogeneous - and without beginning or end in time and space. If the universe is truly homogeneous then every line of sight will eventually end on a galaxy. If it has existed forever then there has been enough time for lig


26. A small and dim but hot star.






27. The distance a moon can be from a planet before shattering from tidal forces






28. The layer of the sun just above the photosphere






29. Venus (retrograde)






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






31. 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.






32. The telescope configuration that has the focus placed at the back of the primary mirror






33. Small moons that maintain the shape of rings around Saturn and Uranus






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






35. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






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






37. A younger cluster of stars - found in the galaxy disk






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






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






40. An object that may remain after a star explodes






41. 1μm 100 nm






42. The instant of time after the Big Bang when space and time obtained their characteristics. (t=10^-43 sec when gravity freezes out-instant when gravity started existing as a separate force)






43. A very dense - highly populated cluster of galaxies






44. Venus






45. Venus






46. A term referring to Earth-like planets






47. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






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






49. The average distance between the Earth and the Sun (=1.5 x10^8km)






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