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. Centered on the sun.






2. Dying large-mass stars lose their outer layers in a violent explosion creating large - chaotic remnants. these brighten like nova but are so much brighter and only occur ONCE PER STAR






3. 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.






4. A crystalline patter found in iron meteorites






5. A faint - remarkably uniform distribution of radiation in space






6. Ganymede






7. A planet that is farther from the sun than the Earth is






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






9. A small and dim but hot star.






10. The rotation period of the Earth measured relative to the Sun.






11. Hydrogen and helium (mainly)






12. A subatomic particle with a negative charge. It creates light.






13. The family of radiant energy that includes light as a subset






14. The temp at which a substance in the vacuum of space solidifies






15. Poitns of gravitational stability in the orbit of a planet






16. Titan






17. Electromagnetic Radiation






18. The Greek philosopher responsible for making the stellar magnitude scale.






19. A perfect absorber and radiator of electromagnetic radiation.






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






21. A particle of light






22. Population 1- similar to the sun and 2% of elements are metal - Population 2- formed before gas was metal- only a fraction of mass is metal.






23. The oldest terrain on the moon






24. Sc galaxies






25. A star that blows itself apart






26. Half of the longest diameter across an ellipse






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






28. An important quality of telescopes that increases as the square of the primary mirror or objective lens






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






30. A nearby galaxy with a quasar-like nucleus. closer but less bright than quasars-weaker






31. Light-flaky crust - convective currents cause it to wrinkle and bunch (1/5 of surface). uniform cratering suggests lack of weathering and tectonics. volcanoes are flat due to atmospheric pressure.






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






33. An empirical scheme for predictin ghe orbital distances of planets






34. The oldest part of the Milky Way






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






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






37. The part of the Milky way that has on-going star formation






38. The law that predicts the possible types of spectra.

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39. A planet orbiting about a distant star






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






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






42. The 11 or 22 period on the sun durin which sunspots increase - decrease - change polarity - increase and decrease again.






43. The location in an H-are diagram of a star cluster - where stars have just left the main sequence. Used to estimate the cluster age.






44. The measure of a variable star's apparent magnitude as it brightens and dims with time






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






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






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






48. 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






49. A toroidal or donut-shaped collection of material attracted to a central body like a star or black hole. Dust around an object






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