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 average distance between the Earth and the Sun (=1.5 x10^8km)






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






3. The trapping of heat by carbon dioxide or other gases in the Earth's atmosphere.






4. Sc galaxies






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






6. Mercury - Venus - Earth - Mars






7. Venus






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






9. Titan






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






11. The process of acquiring material






12. Is there water on the moon?






13. A telescope that uses mirrors to focus light






14. Mercury






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






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






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






18. Comglomerates of ice and rock that orbit the sun in highly elliptical paths






19. A bridge of material held in position above the solar surface. They can remain for hours even days






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






21. 10 nm 10^2 nm






22. The mass of an object divided by its volume






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






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






25. The displacement of spectral lines to redder colors caused by the expansion of the universe.






26. A small chunk of rock in space






27. A spinning neutron star






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






29. Either Io -Europa - Ganymede - or Callisto






30. 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.






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






32. Sa - Sb galaxies where two magnificent arms wind their way from nucleus out in a symmetrical manner.






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






34. The point directly overhead.






35. VENUS






36. A prominence seen against the disk of the sun






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






38. The gap etween saturn's A and B rings






39. In a FLAT UNIVERSE(our universe) - the curvature of space-time is ________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






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






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






42. Norhern lowlands- darker in color and have far fewer craters as if an ancient sea or ice field covered them. southern highlands- much higher in density of craters.






43. The rate of expansion of the universe.






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






45. The era when the ratio of matter to energy greatly favored matter. (verses radiation dominated universe where it was opaque. Matter is now dominated by gravity not photons)






46. An efficient - two-dimensional electronic light detector. Common in digital cameras - they revolutionized astronomical imaging






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






48. Where is the center of the expansion






49. A spread of light with an uninterrupted wavelength distribution of energy.






50. The elementary building blocks from which protons and neutrons are formed.