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. Distance from sun to nucleus- 8 kiloparsecs (26000 LY) - diameter of Milky way- 150000 LY - length for sun to orbit once around milky way- 250 million years






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






3. A perfect absorber and radiator of electromagnetic radiation.






4. Sc galaxies






5. Jupiter - Saturn - Uranus - Neptune






6. 1μm 100 nm






7. Galaxies whose nuclei emit jets of materil at high speeds. material comes from supermassive black holes






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






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






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






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






12. The fate of the universe if it is closed. The universe expanding as much as possible and then retracting






13. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






14. The linear correlation between the rate of the expansion of the universe and distance. Says that as galaxies get farther away in space - the speed with which they recede from us increases. So we can measure the amount of recessional velocity and use






15. Heavier elements such as iron - silicon - magnesium - sulfer - nickel






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






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






18. The surface of the sun






19. Population 1 with higher metals and contain many young stars in star clusters. Distribution of stars is everywhere in disk (arms only have 5% more stars)






20. A quantity measuring the stability of the Earth's atmosphere






21. Jupiter






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






23. A cool collection of gas and dust silhouetted against a brighter background of stars and/or gas






24. The entity from which the whole universe is postulated to have come from.






25. A term referring to Earth-like planets






26. The science of measuring light energy by wavelength.






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

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28. The amount an image is enlarged by a telescope






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






30. A star that blows itself apart






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






32. A collection of galaxies like the one the Milky Way belongs to






33. All possible types of energy that can be emitted and absorbed by atoms.






34. A representation of the changes in color and brightness of an evolving protostar.






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






36. Any change in the speed or direction of an object's motion






37. The law that syas light energy from a blackbody increases as (temperature^4)






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






39. Orbit in Jupiters orbit






40. The study of the universe as a whole.






41. Light scattered through the atmosphere that degrades astronomical images






42. 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.






43. The nuclei of very distant galaxies. Likely a manifestation of supermassive black holes






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






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






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






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






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






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






50. A term referring to Jupiter-like planets