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






2. An element of a highly efficient - two-dimensional electronic light detector






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






4. The science of measuring light energy by wavelength.






5. The distance light travels in one year (=9.46x10^12km).






6. Earth






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






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






9. What are the three possible geometries of the universe?






10. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






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






12. Where is the center of the expansion






13. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere






14. Half of the longest diameter across an ellipse






15. A volume of space where few - if any - galaxies are located






16. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






17. Matter that reveals itself only through its gravitational attraction






18. Is space infinitely large?


19. All wavelengths of light emitted by a blackbody.






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






21. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.






22. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






23. A spread of light with an uninterrupted wavelength distribution of energy.






24. The Greek philosopher responsible for making the stellar magnitude scale.






25. 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.






26. If stars have diff orbital periods - than any arms formed by stars will wind into a tight spiral pattern (billion yrs or so)






27. Venus






28. The powdered stone fragments that make up the lunar 'soil'






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






30. A telescope that uses mirrors to focus light






31. Is there water on the moon?






32. The process that powers the sun and hydrogen bombs






33. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






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






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






36. The mix of pure photon energy that emerged at the start of the universe.






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






38. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation






39. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






40. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






41. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






42. The rate of expansion of the universe.






43. After stars form they pump light energy into surrounding gas causing it to heat up and glow (H2=ionized hydrogen - H1= neutral hydrogen in molcular couds)






44. A particle of light.






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






46. The mass of an object divided by its volume






47. A prominence seen against the disk of the sun






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






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






50. VENUS