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. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






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






3. Hydrogen and helium (mainly)






4. A plot of star absolute magnitude verses spectral type.






5. The larger bodies that formed early in teh solar nebula that were chemically differentiated






6. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






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






8. Mercury






9. The lowest energy of an atom.






10. A galaxy emitting large amounts of energy at long wavelengths.






11. The location of a supermassive black hole






12. The rock that makes up the lunar highlands






13. The temp at which a substance in the vacuum of space solidifies






14. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






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






16. 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)






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






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






19. A collection of galaxies like the one the Milky Way belongs to






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






21. What is the universe expanding into?






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






23. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






24. Collections of young - hot stars






25. The material from which the solar system formed






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






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






28. A particle of light






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






30. The process responsible for creating the arms of flocculent spiral galaxies






31. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






32. Hydrogen and helium (mainly)






33. The equation that describes how matter equates with energy






34. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






35. A distance measure determined by the shifting of a star against the background sky every 6 months.






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






37. Mercury - Venus - Earth - Mars






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






39. The area behind a lens where images are resolved






40. The act of removing an electron from an atom.






41. A crystalline patter found in iron meteorites






42. Formed rapidly - collapsed slower into disk shape - star birth rate is low but lasts longer and ongoing - contain higher mass blue stars.






43. Approximate speed of light in a vacuum






44. Light scattered through the atmosphere that degrades astronomical images






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






46. 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.






47. Electromagnetic Radiation






48. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






49. The process that powers the sun and hydrogen bombs






50. 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

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