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 star that is burning hydrogen to helium in a shell surrounding it's core






2. A high-pressure bulge in Neptune's southern hemisphere






3. Elliptical orbits that come inside orbit of the Earth.






4. 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)






5. A push or a pull






6. A small and dim but hot star.






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






8. A continuous spectrum of light missing energy at a few wave lengths.






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






10. Stars fromt he Halo that have drifted into the disk. as earth zooms past them in a faster orbit they appear to be going backward very fast






11. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






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






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






14. A massive variable star used to find distances to the galaxies or clusters that contain them.






15. 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.






16. 10 cm -> 1 mm






17. Dark - reddish - low-pressure bands in Jupiter's atmosphere






18. A spherical shell of comets that orbit the sun at a great distance (roughly two light years from the sun)






19. The apparent backward motion of a planet against the background of stars.






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






21. A measure of the force of gravity on an object






22. Jupiter






23. The law that syas light energy from a blackbody increases as (temperature^4)






24. A huge sphere of tenuous gas surrounding the nucleus of a comet






25. The first rock-sized bodies that formed in the solar nebula from dust grains






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






27. The dark - relativley smooth areas on the moon; Latin for sea






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






29. 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.






30. 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.






31. The location of a supermassive black hole






32. Heavier elements such as iron - silicon - magnesium - sulfer - nickel






33. A streak of light in the atmosphere






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






35. IO






36. Sc galaxies






37. Venus






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






39. 10 nm 10^2 nm






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






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






42. The place in the sky that the Earth's axis points toward (can be either north or south)






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






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






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






46. A planet orbiting about a distant star






47. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






48. The mass of an object divided by its volume






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






50. The lens in a telescope used to determine the magnification







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