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5 Written questions

5 Matching questions

  1. what heavy isotope changes relative to what light isotope in sea water, as ice sheets get larger during a glacial interval?
  2. what is the difference between weather and climate?
  3. how do we know there has been a sharp rise in atmospheric CO2 since the industrial revolution?
  4. how do we know what the concentration of atmospheric CO2 was during past glacial and interglacial cycles? where do these samples come from?
  5. how far back in time can we trace climate using historical documents?
  1. a heavy isotope increases relative to light isotope at cooler temperatures (O18/O16 goes up).
  2. b weather refers to the state of the atmosphere at a given time and place; climate is a description of aggregate weather conditions based on observations over many decades; climate is often defined as "average weather"
  3. c 30% higher than highest level over at least the last 650,000 years
  4. d changes in carbon dioxide and methane are linked to fluctuating temperatures. the cores also include atmospheric fallous such as wind-blown dust, volcanic ash and modern day pollution
  5. e ...

5 Multiple choice questions

  1. ...
  2. produce results that are the opposite of the initial change and tend to offset it
    ex: the negative effect that increased cloud cover has on the amount of solar energy available to hear the atmosphere
  3. (1) seafloor sediments- contain remains of organisms that one lived near sea surface; useful recorders of worldwide climate change
    (2) oxygen isotope analysis- based on precise measurement of the ratio bt 2 isotopes of oxygen; O^16 is most common and the heavier O^18: O^18/O^16 ratio in shells of microorganisms- past temperatures
    (3) climate change recorded in glacial ice
    (4) tree rings- archives of environmental history
    (5)fossil pollen, corals, historical data
  4. positive feedbacks are changes that reinforce the initial change
    ex: warmer surface temperatures can cause an increase in evaporation, which further increases temperature as the additional water vapor absorbs more radiation emitted by Earth
  5. by analyzing pollen from accurately dated sediments, it is possible to obtain high-resolution records of vegetational changes in an area because pollen and spores are parts of life cycles of many plants and are easily identifiable

5 True/False questions

  1. what are other, natural sources of CO2 and aerosols?(1) seafloor sediments- contain remains of organisms that one lived near sea surface; useful recorders of worldwide climate change
    (2) oxygen isotope analysis- based on precise measurement of the ratio bt 2 isotopes of oxygen; O^16 is most common and the heavier O^18: O^18/O^16 ratio in shells of microorganisms- past temperatures
    (3) climate change recorded in glacial ice
    (4) tree rings- archives of environmental history
    (5)fossil pollen, corals, historical data

          

  2. what was the purpose of the Ocean Drilling Program?(1) seafloor sediments- contain remains of organisms that one lived near sea surface; useful recorders of worldwide climate change
    (2) oxygen isotope analysis- based on precise measurement of the ratio bt 2 isotopes of oxygen; O^16 is most common and the heavier O^18: O^18/O^16 ratio in shells of microorganisms- past temperatures
    (3) climate change recorded in glacial ice
    (4) tree rings- archives of environmental history
    (5)fossil pollen, corals, historical data

          

  3. what is albedo?forms at ~ 20 - 30 km above Earth's surface, and is a protective layer that helps to filter out UV radiation by absorbing some of its energy. Life on planet Earth needs this because too much UV at Earth's surface (where we all live) can be harmful to cell function.

          

  4. at what end of the electromagnetic spectrum does one find higher energy wavelengths, and at what end are the lower energy waves?the hotter the radiating body, the shorter the wavelength of maximum raidation

          

  5. what is the composition of foraminifera shells (or tests)?...