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






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






3. IO






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






5. A large and bright but cool star.






6. A large and bright but cool star.






7. Venus (retrograde)






8. When the Sun moves from south to north across the celestial equator (about March 21)






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






10. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






11. The organization of clusters of galaxies into sheets and strings






12. That which is responsible for Jupiter's magnetic field






13. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






14. Massive compact halo objects (MACHO) - weakly interacting massive particles (WIMPY's)






15. A rock or iron specimen that has fallen from space






16. A telescope that uses mirrors to focus light






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






18. A term referring to the orbital character of stars near the Sun






19. Venus






20. Mercury






21. 1 mm 1μm






22. The point where a superior planet is as far away from the sun as it can be (as seen from the Earth)






23. The sinking of denser elements to the center of a young molten planet






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






25. A technique using computer-controlled mirrors to sharpen images distorted by the atmosphere






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






27. Matter that reveals itself only through its gravitational attraction






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






29. 10^2 nm 10^7 nm






30. The Big Bang says that the universe has not existed forever. It had a distinct beginning about 14 billion years ago called the 'Big Bang'. Therefore light from any object more than 14 billion light years away has not had time to reach us. The other p

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31. A repeated - periodic push or pull capable of summing into a larger push or pull






32. Earth






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






34. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie

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






36. An object that may remain after a star explodes






37. Dark areas on the sun that are cooler than the surrounding photosphere






38. Jupiter






39. 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






40. 30AU to 50Au from sun - consists of ancietn premordial objects made of frozen ice and dust-35000 objects or more that are larger than 100 km in diameter and many more smaller than this






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






42. The high- temperatature outer layer of the sun






43. When massive objects bend space and time enough to create multiple images of an object located behind them






44. A word meaning 'the same in all directions.'






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






46. Very center of galaxy. suggestion of a black hole






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






48. Saturn






49. A spread of light with an uninterrupted wavelength distribution of energy.






50. Half of the longest diameter across an ellipse







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