What is a "proxy"? Describe some of the proxies of ancient climate conditions
What will be an ideal response?
A proxy is a substitute measurement, usually referring to a measurement of a property of rocks or organisms that also reveals something about climate, such as temperature. Examples include tree-ring widths, chemical compositions of microorganisms and glacial ice, and features in rocks that reveal the past presence of glaciers (a complete answer would explain one or more of these in some depth to demonstrate comprehension).
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Which of the following chemicals is the most abundant gas in the mesosphere?
A. carbon dioxide B. oxygen C. ozone D. nitrogen
Describe the causes and effects of eutrophication. What will be an ideal response?
In Morocco, all major cities such as Fez and Meknes are located along the coast
Indicate whether the statement is true or false
This is believed to be one of the causes of global warming and climate change associated with it
A) the burning of fossil fuels B) the use of radioactive elements for energy and as weapons C) overuse of limited fresh water resources D) the result of mass extinctions as human civilization spreads E) changes in the Sun's energy