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. Dying small mass stars lose their outer layers in a relatively gentle way - creating a round or bipolar nebula about the star (round like planets)






2. 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.






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






4. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






5. 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






6. Venus






7. A very low mass particle formed in solar fusion reactions that reacts only weakly with matter






8. Mercury






9. The powdered stone fragments that make up the lunar 'soil'






10. A prominence seen against the disk of the sun






11. A change in the wavelength of light caused by a motion between the observer and light (or wave) source (blue shift if getting closer - red shift if moving away)






12. A word used in astronomy to describe all elements besides hydrogen and helium






13. Infinitely long -> 10 cm






14. First accurately measured the speed of light in a vacuum






15. The distance light travels in one year (=9.46x10^12km).






16. A star that is in the process of forming. It glows from gravitational contraction






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






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






19. A volume of space where few - if any - galaxies are located






20. A streak of light in the atmosphere






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






22. VENUS






23. The material from which the solar system formed






24. Mercury






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






26. An entity that is likely in the nucleus of most - if not all - galaxies.






27. The crust of a meteorite caused by its entry into Earth's atmosphere






28. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






29. A telescope that uses lenses to focus light






30. Hydrogen and helium (mainly)






31. The lowest energy of an atom.






32. A bridge of material held in position above the solar surface. They can remain for hours even days






33. A measure of the ability of a telescope to see fine detail






34. Places in the asteroid belt - caused by resonance with Jupiter - where there are no asteroids






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






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






37. An energetic event taking place in the early universe






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






39. Either Io -Europa - Ganymede - or Callisto






40. A star fusing hydrogen to helium in it's core






41. The line on an H-are diagram going from upper left to lower right where normal stars of different masses reside.






42. 100 nm 10 nm






43. The dimming of starlight by intervening dust






44. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






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






46. A distance measure determined by the shifting of a star against the background sky every 6 months.






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






48. The rotation period of the Earth measured relative to the stars.






49. A bright area of higher temperature that often proceeds the formation of sunspots.






50. The point in its orbit where a planet is nearest the sun







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