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






2. Jupiter - Saturn - Uranus - Neptune






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






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






5. Centered on the sun.






6. Very center of galaxy. suggestion of a black hole






7. 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)






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






9. The law that predicts the possible types of spectra.

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






11. 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)






12. Possible Fates of the Universe






13. Ganymede and Titan






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






15. A small chunk of rock in space






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






17. 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.






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






19. Jupiter






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






21. The 'edge' of the universe. Light beyond this has not reached us yet.






22. Old - pock marked - icy surface - interior is not differentiated - geologically dead - NOT ACTIVE SURFACE






23. The layer of the sun just above the photosphere






24. 1 mm 1μm






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






26. N=are*Fp(Ne)(Fl)(Fi)(Fc)(L) N: number of civilizations possible to communicate with are*: rate solar-like stars are created Fp: fraction of stars with planets Ne: number of planets like ours Fl: fraction of planets with life Fi: intelligent life Fc:






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






28. The process of acquiring material






29. The study of the universe as a whole.






30. First accurately measured the speed of light in a vacuum






31. A spectrum of light with energy at only a few wavelengths.






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






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






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






35. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






36. 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.






37. A method of finding a star's distance from its absolute magnitude and spectral type or color.






38. Disk dust grains are made of all the elements that are not in gaseous form in space which blocks starlight and causes interstellar extinction






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






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






41. 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.






42. A prominence seen against the disk of the sun






43. 1 mm 1μm






44. The gap inthe outer portion of Saturn's A ring






45. 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)






46. Why do Galaxies move very rapidly in the interiors of the dense clusters?






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






48. An entity that is likely in the nucleus of most - if not all - galaxies.






49. The fusion process that turns three helium nuclei into a carbon nucleus






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