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






2. An empirical scheme for predictin ghe orbital distances of planets






3. Ganymede and Titan






4. The amount of density needed to stop the universe from expanding and to begin the big crunch represented by Pc






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






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






7. Hot cells of gas that rise and fall in the hotosphere






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






9. Venus






10. In an OPEN UNIVERSE - the curvature of space-time is ____ - Parallel beams will converge/diverge/remain parallel (circle one). The density parameter - Ω0 - is____.






11. Light scattered through the atmosphere that degrades astronomical images






12. The faint glow of light left over from the Big Bang. cosmic microwave background are the photons that remain after the big bang that have not turned into matter.






13. 1 mm 1μm






14. 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.






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






16. 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 _____.






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






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






19. The cosmological principle is the assumption that the universe is isotropic and homogeneous.The Big Bang assumes it to be a correct principle so that what we observe is exactly like What is too far away to be observed.






20. The rock that makes up the lunar maria






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






22. A particle of light






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






24. Poitns of gravitational stability in the orbit of a planet






25. The telescope configuration that has the focus placed at the back of the primary mirror






26. The law that describes the blackbody curve - and let to quantum mechanics.

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






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






29. The oldest part of the Milky Way






30. Any change in the speed or direction of an object's motion






31. The organization of clusters of galaxies into sheets and strings






32. A term referring to Jupiter-like planets






33. A star that has become a red giant for the second and final time. It is burning helium to carbon in a shell surrounding the core






34. Dark areas on the sun that are cooler than the surrounding photosphere






35. The philosophical stand that says a simpler explanation is more likely to be correct than a complicated one.

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






37. 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.






38. Is there water on the moon?






39. A large and bright but cool star.






40. Highlands: rocks are made of lighter anorthosite (similar to old earth rocks) Maria: rocks made of heavy mare basalt (volcanic rock) everywhere else is loose regolith created by meteoric impact.






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. Mercury






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






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






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






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






47. A small spherical dark nebula






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






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






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