Objectives #15 (October
By the end of today's class, you should be able to do the following:
w List the geotectonic settings in which volcanoes occur (subduction zones, divergent zones, hotspots).
w Tell why volcanoes occur at each of these settings.
w Tell what makes rock melt in the crust and mantle settings where volcanoes occur. Describe the process in terms of changing temperature, changing pressure, and introduction of "impurities" (water and sediments) into the melt.
w Draw a graph illustrating the varying conditions that lead to rock melting.
LATITUDE AND LONGITUDE
w Describe the longitude and latitude coordinate system for locating points on Earth's surface.
w Find the approximate (degrees) latitude and longitude of a general area using a world map.
w Explain how the measurement units of degrees, minutes, and seconds are used to indicate latitude and longitude.
w Find precise latitude and longitude coordinates of a specific site using a topographic quadrangle map.
w Explain what is meant by "7.5 minute series" in reference to a topographic quadrangle map.
w Log in to the class wiki and add your name to the "Earthquake Maps" list. Find the latitude and longitude coordinates of the study area for which you sign up.