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






2. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






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






4. A younger cluster of stars - found in the galaxy disk






5. The rock that makes up the lunar maria






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






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






8. The material from which the solar system formed






9. Jupiter






10. 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)






11. Approximate speed of light in a vacuum






12. Sulfurous volcanoes - pools of liquid sulfur - surface resembles cheese pizza ACTIVE SURFACE






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






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






15. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






16. 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.






17. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)






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






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






20. The average distance between the Earth and the Sun (=1.5 x10^8km)






21. 1μm 100 nm






22. The point in its orbit where a planet is farthest from the sun






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






24. Europa






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






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






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






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






29. Radiation given off by electrons accelerating in a magnetic field






30. The entity responsible for spiral arms in grand-design spiral galaxies






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






32. Half of the longest diameter across an ellipse






33. The oldest terrain on the moon






34. Mercury






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






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






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






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






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

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40. The location of a supermassive black hole






41. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






42. A particle of light.






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






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






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






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






47. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






48. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






49. 1. We see rapid movements or high energy radiation coming at some level from the nuclei of nearly every galaxy we have looked at. 2. We suspect that the creation of these supermassive black holes is part of the galaxy formation process.






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