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 continuous spectrum of light missing energy at a few wave lengths.






2. The elementary building blocks from which protons and neutrons are formed.






3. Is there water on the moon?






4. 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)






5. A crystalline patter found in iron meteorites






6. Matter so dense that even light cannot escape its gravity






7. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






8. Hydrogen and helium (mainly)






9. A crystalline patter found in iron meteorites






10. Venus (retrograde)






11. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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12. A small spherical dark nebula






13. The relation that tells how light dims with distance.






14. When the Sun is farthest north of the celestial equator (about June 22)






15. 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)






16. Dark - reddish - low-pressure bands in Jupiter's atmosphere






17. All wavelengths of light emitted by a blackbody.






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






19. All possible types of energy that can be emitted and absorbed by atoms.






20. The rotation of a star or planet at different speeds at its equator and poles






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






22. The study of the universe as a whole.






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






24. The sinking of denser elements to the center of a young molten planet






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






26. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






27. The mirror that gathers the light in a reflector






28. What is the universe expanding into?






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






30. A star that erratically and explosively brightens and dims






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






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






33. A particle of light






34. 1μm 100 nm






35. When the Moon entirely blocks the Sun.






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






37. A huge sphere of tenuous gas surrounding the nucleus of a comet






38. A force exerted by reflecting sunlight






39. The location of a supermassive black hole






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






41. 100 nm 10 nm






42. 1 mm 1μm






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






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






45. The rate of expansion of the universe.






46. Europa






47. A faint - remarkably uniform distribution of radiation in space






48. A prominence seen against the disk of the sun






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






50. Light scattered through the atmosphere that degrades astronomical images