Biology Forums - Study Force

Which of the following has been used to reconstruct past climates?
  a. analysis of air bubbles trapped in ice
  b. study of documents describing floods, droughts and crop yields
  c. the ratio of oxygen 18 to oxygen 16 in the shells of marine organisms
  d. study of geologic formations
  e. all of the above

Evidence suggests that throughout much of the earth's history, the global climate was:a.
   warmer than it is today
  b. colder than it is today
  c. about the same temperature as it is today
  d. more variable than it is today

Indications of past climates in tree rings are determined by examination of the:a.
   thickness of growth rings
  b. density of growth rings
  c. presence of frost rings
  d. all of the above
  e. only a and b

A high concentration of oxygen 16 found in the ice caves of Antarctica and Greenland would
  indicate __________ at the time the ice was formed.
  a. cold air temperatures
  b. mild winters
  c. intense ultraviolet radiation
  d. the caves were under the ocean

Which of the following is not true?
  a. oxygen 16 evaporates more readily from the ocean than oxygen 18
  b. oxygen 16 and oxygen 18 are found in roughly equal amounts in ocean water
  c. the nucleus of oxygen 18 contains two more neutrons than the nucleus of
  oxygen 16
  d. both oxygen 16 and oxygen 18 are found in the shells of marine organisms

During a storm surge, water levels along the coast typically rise only about 2 feet.
  a. true
  b. false