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 act of removing an electron from an atom.






2. A measure of how an object resists accelerating when acted upon by a force. It is proportional the amount of matter in an object






3. A force exerted by reflecting sunlight






4. The ratio of the actual density of the universe to the critical density. (actual density divided by the critical density






5. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






6. Ganymede and Titan






7. Small moons that maintain the shape of rings around Saturn and Uranus






8. Ganymede






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






10. Ganymede






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






12. Theory virtually demands that the geometry of the universe be ______. Results of measuring lumps in the cosmic background radiation indicate that the universe geometry is ________.






13. An energetic event taking place in the early universe






14. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






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






16. The apparent path of the Sun through the stars on the celestial sphere.






17. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






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






19. 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






20. The oldest part of the Milky Way






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






22. Jupiter






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






24. A term referring to Earth-like planets






25. A particle of light






26. 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.






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






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






29. The imaginary sphere centered on the Earth that hols the stars.






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






31. A change in the appearance of the sun at the edge of the solar disk






32. Titan






33. The oldest terrain on the moon






34. An empirical scheme for predictin ghe orbital distances of planets






35. Plate tectonics due to thickness of crust and maintain their general form when they collide-where most volcanoes are.






36. A crystalline patter found in iron meteorites






37. An object that may remain after a star explodes






38. The law that describes the blackbody curve - and let to quantum mechanics.


39. How is the Hubble Law consistent with an expanding universe?






40. Sc galaxies






41. 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.






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






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






44. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






45. Any class of objects with a uniform luminosity used to determine distance.






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






47. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






48. The rotation of a star or planet at different speeds at its equator and poles






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






50. VENUS






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