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. What causes the zones and belts on jupiter and saturn?






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






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






4. Collections of young - hot stars






5. 1-orbit aroudn the sun 2- are in hydrostatic equilibrium and 'mostly round' 3- have not cleared debris around its orbit 4- are not satellites






6. Venus






7. The opaque universe that existed for 300000 years after the Big Bang. (photons outnumbered nuclei by 1 billion to one - so less light)






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






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






10. The study of the universe as a whole.






11. Young clusters in disk are irregularly shaped since they have no time to relax into the rounder relaxed shape of globular clusters-will constantly be torn apart and assimilated.






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






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






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






15. Half of the longest diameter across an ellipse






16. The movement of the Earth's crustal plates riding on top of the mantle.






17. Sc galaxies






18. The equation that describes how matter equates with energy






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






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






21. How did Earth come to have an oxygen rich atmosphere?






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






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






24. The slow wobble of the Earth on its rotation axis.






25. The surface of the sun






26. The wavelengths where a specific element can absorb or emit light.






27. Jupiter






28. 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 ________.






29. Small compact stars called white dwarfs can have material deposited on their surfaces. In time material heats up and explodes in surface nuclear reaction- star brightens - settles - repeats.






30. Ganymede






31. 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.






32. A prominence seen against the disk of the sun






33. The layer of the sun just above the photosphere






34. The rate of expansion of the universe.






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






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






37. A streak of light in the atmosphere






38. Large bulge - tightly wound spiral arms - relatively few h2 regions and are smooth






39. Why do Galaxies move very rapidly in the interiors of the dense clusters?






40. A force exerted by reflecting sunlight






41. Radiation given off by electrons accelerating in a magnetic field






42. The class of all objects having high energy radiation coming from their nuclei. Active Galactic Nucleus- Blazars - Quasars - Radio and Emit synchrotron radiation






43. Milky way galaxy is a member - a small poor cluster-about 30 galaxies






44. Is space infinitely large?

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






46. Star speed at outer edge of galaxy should begin to diminish - but they dont so we guess that this means there is increasing force (aka dark matter)






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






48. Jupiter






49. A cloud of ionized hydrogen. Formed when young stars heat the surrounding gas






50. Earth