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






2. The dimming of starlight by intervening dust






3. Possible Fates of the Universe






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






5. Formed from slow rotating clouds - collapsed quicker - initial star formation rate is high but died out - older - little rotation - look redder






6. The lowest energy of an atom.






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






8. Why does the earth have few craters while the moon has many?






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






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






11. The gap inthe outer portion of Saturn's A ring






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






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






14. A star that blows itself apart






15. The mass of an object divided by its volume






16. A phenomenon seen when the Earth passes through the orbit of a burned out comet






17. What Ole Roemer used to measure the speed of light in a vacuum






18. What is the universe expanding into?






19. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.






20. The process responsible for creating the arms of flocculent spiral galaxies






21. Distribution of dust (tells us disk is thin) - find distances to O&B stars and H2 regions (arms are sights of star formation and OB stars live and die at location of birth) -Milky way has four arms. Sun is in spur apart from arms.






22. 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






23. A perfect absorber and radiator of electromagnetic radiation.






24. 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)






25. 10 nm 10^2 nm






26. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






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






28. Then the Sun moves from north to south across the celestial equator (about September 23)






29. 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)






30. The surface of the sun






31. A star that erratically and explosively brightens and dims






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






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






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






35. When the Moon entirely blocks the Sun.






36. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






37. Half of the longest diameter across an ellipse






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






39. The state of having a balance between inward and outard pressures in a gas--the inward force from gravity is balanced by the outward force from heat.






40. Jupiter






41. A two-filter measure of the color - and hence temperature - of a star.






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






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






44. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






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






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






47. The rock that makes up the lunar maria






48. 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)






49. The oldest grouping of stars - found in the galaxy halo






50. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






Can you answer 50 questions in 15 minutes?



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