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. Relativity predicts that nothing can travel faster than the speed of light in a vacuum - How can it move slower?






2. Flattened spherical distribution of old stars with some young stars too. 'hub' of Milky way - stars orbit with solid body speeds. Elongated into bar shape






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






4. The apparent magnitude a star would have if it were at a distance of 10 parsecs.






5. Consists of old red stars in slow orbits that plunge through disk and bulge. about 1% are old - round globular clusters.






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






7. Jupiter - Saturn - Uranus - Neptune






8. The name for the only seriously considered theory of the universe.






9. A galaxy sending out a stream of material from its nucleus






10. An evolved star - past the helium flash that is burning helium to carbon in it's cores






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






12. What is the universe expanding into?






13. A streak of light in the atmosphere






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






15. An element of a highly efficient - two-dimensional electronic light detector






16. A small chunk of rock in space






17. A distance measure determined by the shifting of a star against the background sky every 6 months.






18. The particle horizon is the farthest we can see. It exists because the universe had a beginning and thus a definite age. Light from distances farther away from the particle horizon have not had time to reach us yet.






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






20. The mass of an object divided by its volume






21. The fusion process that turns three helium nuclei into a carbon nucleus






22. The layer of the sun just above the photosphere






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






24. The apparent backward motion of a planet against the background of stars.






25. The shadow area behind the Earth or Moon where the Sun is completely obscured.






26. A younger cluster of stars - found in the galaxy disk






27. When a planet lines up with the sun inthe sky






28. The mirror that determines the focus configuration of a reflector






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






30. 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.






31. Small bulges - loosely wound - massive arms - arms have many H2 regions and look very lumpy






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






33. The force of attraction between any two objects having mass






34. The crust of a meteorite caused by its entry into Earth's atmosphere






35. Jupiter






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






37. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






38. Sc galaxies






39. Sc galaxies






40. A word meaning 'the same everywhere throughout.'






41. Sc galaxies where star formation and destruction is so rapid that supernova explosions are mainly responsible for compressing gas to create new stars.






42. A planet that is closer to the sun than the earth






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






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






45. The assumption that the universe is isotropic (same in all directions) and homogeneous (Same everywhere throughout)






46. 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.






47. The organized effort to find life elsewhere in the universe. (Search for Extra-Terrestrial Intelligence)






48. The act of removing an electron from an atom.






49. A large - irregularly shaped rocky object orbiting the sun mostly between mars and jupiter. Left-over planetesimals






50. The location around an atom where an electron resides.