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 Greek philosopher responsible for making the stellar magnitude scale.






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






3. The Big Bang was not an explosion of matter into empty space - like the explosion of a bomb. Instead - it was an emergence of space and time filled with pure energy where before none of this was present. The point from which is emerged is called the






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






5. Either Io -Europa - Ganymede - or Callisto






6. When the Sun moves from south to north across the celestial equator (about March 21)






7. 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 _____.






8. Where is the center of the expansion






9. The lowest energy of an atom.






10. Wave- only waves cause an interference pattern when passing through a double slit - particle- only particles deposit energy at specific locations (the way an image builds up on digital camera)






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






12. 10^2 nm 10^7 nm






13. The rotation period of the Earth measured relative to the stars.






14. A crystalline patter found in iron meteorites






15. 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.






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






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






18. Medium bulge - moderately would arms - arms have H2 regions in them and look sort of lumpy






19. A collection of comets in the plane of the solar system - located beyond the orbit of Pluto






20. IO






21. Centered on the Earth






22. How did Earth come to have an oxygen rich atmosphere?






23. As open clusters age - they push gas away but dust remains this can reflect light giving the cluster a blue-ish color. also called reflection nebula






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






25. The point where an inferior planet is as far away from the sun as it can be (as seen from the Earth)






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






27. The source of the force that is accelerating the expansion rate of the universe.






28. First accurately measured the speed of light in a vacuum






29. The point in its orbit where a planet is nearest the sun






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






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






32. Matter that reveals itself only through its gravitational attraction






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






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






35. The number of protons in an atom.






36. Radiation given off by electrons accelerating in a magnetic field






37. Jupiter






38. Arcs of increased mass concentration that slow stars and gas down as they orbit through which cause the formation of stars.






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






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






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






42. The relation that tells how light dims with distance.






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






44. In a CLOSED UNIVERSE - the curvature of space-time is _________. Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is _____.






45. A change in the appearance of the sun at the edge of the solar disk






46. A telescope that uses lenses to focus light






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






48. Saying that the sky should not get dark at night because all lines of sight end on a star meaning that the night sky should be ablaze BUT the big bang - because the universe had a beginning - says that the sky gets dark because out in space - galaxie


49. A highly variable galaxy nucleus of which BL Lac is one. Their light is highly energetic and their spectra are featureless. (face on)






50. 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.