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






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






3. A spinning neutron star






4. Venus






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






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






7. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






8. A fusion process in which protons build together to form helium






9. Light scattered through the atmosphere that degrades astronomical images






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






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






12. 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.






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






14. The dark - relativley smooth areas on the moon; Latin for sea






15. The projection of the Earth's equator onto the celestial sphere.






16. The normal eastward movement of a planet against the background of hte distant stars.






17. A small round distribution of gas surrounding a dying star






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






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






20. 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






21. Moon in less than the angular diameter of the Sun.






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






23. Moon in less than the angular diameter of the Sun.






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






25. In Ptolemy's geocentric solar system - the small circle on which a planet moved.






26. Radiation (possibly left over from the big bang) that fills the universe. Perfect black body spectrum and tells us a bit aout how galaxies are formed.






27. Flat disk with gas - dust - H2 regions - molecular clouds - dust young stars and remnants of old planetary nebula and supernova remnants. stars spin together with similar velocities called differential rotation






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






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






30. The amount an image is enlarged by a telescope






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






32. Mercury






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






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






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






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






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






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






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






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






41. The science of measuring the apparent magnitudes of stars by imaging them through different filters.






42. The entity responsible for spiral arms in grand-design spiral galaxies






43. A particle of light.






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






45. Originially thought to be stars emitting radio radiation but are now concluded to be nuclei of distant galaxies (same as radio galaxies aka emit streams of material)






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






47. 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






48. In Ptolemy's geocentric solar system - the large circle on which a planet's epicycle moved around the Earth.






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






50. The larger bodies that formed early in teh solar nebula that were chemically differentiated