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. Cold aggregates of gas - large and contain a huge amount of matter - so cold that molecules stick together to form molecules.






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






3. Hydrogen and helium (mainly)






4. The amount an image is enlarged by a telescope






5. A bright area of higher temperature that often proceeds the formation of sunspots.






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






7. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






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






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






10. 10 cm -> 1 mm






11. The slow wobble of the Earth on its rotation axis.






12. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






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






14. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






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






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






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






18. A galaxy sending out a stream of material from its nucleus






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






20. Extremely round - lots of liquid water - ice rafts on surface ACTIVE SURFACE






21. Ganymede






22. A star that is in the process of forming. It glows from gravitational contraction






23. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






24. A planet that is farther from the sun than the Earth is






25. Dark areas on the sun that are cooler than the surrounding photosphere






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






27. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






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






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






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






31. 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.






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






34. IO






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






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






37. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






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






39. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






40. Moon in less than the angular diameter of the Sun.






41. A planet that is closer to the sun than the earth






42. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






43. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






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






45. A planet that is farther from the sun than the Earth is






46. Mercury - Venus - Earth - Mars






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






48. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






49. A high-pressure bulge in Neptune's southern hemisphere






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