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 temp at which a substance in the vacuum of space solidifies






2. Ancient stream channels - flood planes - and sedimentary-type rock. Frozen water is found in the polar ice caps and in the soil.






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






4. A fusion process in which a carbon atom transmutes to oxygen and back - creating a helium atom in the process






5. Extends to a distance of 50000AU. Same objects as in the Kuiper belt-when they fall in toward the sun they become comets. Debris from comets hitting the Earths atmosphere cause meteor showers.






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






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






8. Radiation emitted when charged particles spiral rapidly in a magnetic field. come off of jets from black holes.






9. The final end state of an intermediate to high mass star. An entity in which all the electrons have been pushed into the protons.






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






11. A word meaning 'the same in all directions.'






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






13. The area behind a lens where images are resolved






14. A star that erratically and explosively brightens and dims






15. A small and dim but hot star.






16. 10^2 nm 10^7 nm






17. Centered on the Earth






18. IO






19. We can infer the absolute magnitude of pulsating variable stars by measuring their pulsation periods. The longer the pulsations - the greater their luminosities. We then again measure their apparent magnitudes - compare it with their absolute magnitu






20. 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.






21. The shadow behind the Earth or Moon where the Sun is partially obscured.






22. 10 nm 10^2 nm






23. When the Sun is farthest south of the celestial equator (About December 22)






24. Titan






25. 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.






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






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






28. Any class of objects with a uniform luminosity used to determine distance.






29. 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






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






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






32. The final end state of a high mass star. .An entity for which gravity has completely overwhelmed all other forces of nature.






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






34. Venus






35. Latin for 'cloud'. A word used to describe the collections of gas and dust in the Milky Way and other galaxies






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






37. Clouds of low density gas often found glowing faintly on either side of an AGN.






38. A small spherical dark nebula






39. A telescope that uses lenses to focus light






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






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






42. When one side of a body always faces the planet it revolves around






43. The rate of expansion of the universe.






44. Possible Fates of the Universe






45. A star that is burning hydrogen to helium in a shell surrounding it's core






46. A star without enough mass to begin hydrogen fusion






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






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






49. 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.






50. Very center of galaxy. suggestion of a black hole