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. Is there water on the moon?






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






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






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






5. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






6. The movement of the Earth's crustal plates riding on top of the mantle.






7. The source of the force that is accelerating the expansion rate of the universe.






8. Is space infinitely large?

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9. When material is heated and moves taking the heat energy with it






10. The normal eastward movement of a planet against the background of hte distant stars.






11. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






12. 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.






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






14. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






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






16. The science of measuring light energy by wavelength.






17. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






18. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






19. A measure of the seasonal shifting of a star's position against farther stars or galaxies. The closer the star - the greater is the angular distance it shifts. We use it to find distances to stars that are up to 1000 pc away.






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






21. Venus






22. Collections of young - hot stars






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






24. 10 cm -> 1 mm






25. The name for the only seriously considered theory of the universe.






26. A term referring to Jupiter-like planets






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






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






29. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






30. How did Earth come to have an oxygen rich atmosphere?






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






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






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






34. The light produced when particles from the sun collide with atmospheric molecules






35. The time when the universe cooled sufficiently for atoms to exist. radiation dominated= first 300000 years - THEN era of recombination turns into matter dominated for next.






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






37. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






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






39. 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.






40. A very dense - highly populated cluster of galaxies






41. Clouds of low density gas often found glowing faintly on either side of an AGN.






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






43. Matter that reveals itself only through its gravitational attraction






44. Form honeycomb like patterns surrounding empty or nearly empty voids.






45. The study of the universe as a whole.






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






47. The rotation period of the Earth measured relative to the Sun.






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






49. Either Io -Europa - Ganymede - or Callisto






50. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.