Chapter 1. Volcanoes

Question Click on one location where there is melting because of a decrease in pressure.

xFE/xVtgyYC7xhylMsWvEOy79gwqBtALy+a0HYdeCRd3vfw3wKIPh4kd1wd2prYZasDwpm8dMggfQI+C1yYDyuIjWKf4oc8t6qJQcw== {"title":"Melting","description":"The rock here is hot enough so that with a reduction of pressure caused by the divergent plate boundary, there is melting.","type":"correct","color":"#99cc00","code":"[{\"shape\":\"poly\",\"coords\":\"206,148,211,181,193,174,198,167\"}]"} {"title":"Too Deep","description":"Incorrect: This is too deep. The pressure is still too high for melting. ","type":"incorrect","color":"#993300","code":"[{\"shape\":\"poly\",\"coords\":\"193,174,212,182,228,238,238,255,230,272,134,218,155,208,173,202\"},{\"shape\":\"poly\",\"coords\":\"308,182,322,181,326,231,344,248,342,265,316,253,296,264,292,243,306,228\"}]"} {"title":"Mantle","description":"Incorrect: This is the mantle. It is not molten.","type":"incorrect","color":"#333300","code":"[{\"shape\":\"poly\",\"coords\":\"36,165,72,129,82,128,194,172,174,202,133,217\"},{\"shape\":\"poly\",\"coords\":\"229,272,240,256,221,220,212,178,268,211,307,183,304,230,292,243,296,266,269,293\"},{\"shape\":\"poly\",\"coords\":\"450,326,421,237,397,216,342,190,321,181,328,232,346,249,344,264\"}]"} {"title":"Inc Pressure","description":"Incorrect: The pressure increases here, so there is a different reason for melting here. ","type":"incorrect","color":"#000080","code":"[{\"shape\":\"poly\",\"coords\":\"42,102,62,104,63,125,39,146\"},{\"shape\":\"poly\",\"coords\":\"435,195,473,203,495,307,457,313,417,207\"},{\"shape\":\"poly\",\"coords\":\"502,153,591,69,582,127,512,216\"}]"} {"title":"Convergent Boundary","description":"Incorrect: There is no melting here. This is at the surface, it is too cool for rocks to melt.","type":"incorrect","color":"#333333","code":"[{\"shape\":\"poly\",\"coords\":\"67,105,83,95,99,93,128,76,147,71,170,61,187,55,201,41,212,32,222,27,235,27,222,38,205,48,188,63,150,79,126,89,73,110\"},{\"shape\":\"poly\",\"coords\":\"442,47,433,69,425,83,428,94,444,104,457,114,462,130,436,173,428,190,438,195,445,186,461,149,475,125,466,104,446,92,440,84,455,49\"}]"} {"title":"Already melted","description":"Incorrect: The magma has already formed here. Melting occurs deeper within the Earth were it is hotter.","type":"incorrect","color":"#800000","code":"[{\"shape\":\"poly\",\"coords\":\"502,152,591,67,576,66,562,57,546,55,527,43,507,51,497,61,479,75,503,85,510,100,513,106\"},{\"shape\":\"poly\",\"coords\":\"302,152,315,144,386,170,396,162,379,153,314,130,305,141\"},{\"shape\":\"poly\",\"coords\":\"297,67,365,81,366,70,298,58\"},{\"shape\":\"poly\",\"coords\":\"275,33,301,36,308,43,299,45,267,39\"},{\"shape\":\"poly\",\"coords\":\"357,32,335,39,340,42,326,47,334,51,306,58,301,54,323,47,314,44,329,39,325,38,347,30\"},{\"shape\":\"poly\",\"coords\":\"281,46,293,51,230,70,236,74,218,81,227,83,188,102,180,95,207,82,199,76,217,72,216,67,279,47\"},{\"shape\":\"poly\",\"coords\":\"204,148,212,150,241,132,240,126,203,148\"},{\"shape\":\"poly\",\"coords\":\"189,119,199,123,227,107,215,104\"},{\"shape\":\"poly\",\"coords\":\"127,106,167,119,173,111,160,102,131,97\"},{\"shape\":\"poly\",\"coords\":\"194,26,206,31,199,39,182,56,166,57,144,70,125,74,105,88,83,93,65,99,53,107,39,101,64,91,91,83,152,55,180,43\"}]"} {"title":"melting2","description":"Hotspots are locations where melting occurs.","type":"correct","color":"#ffffff","code":"[{\"shape\":\"poly\",\"coords\":\"306,185,329,187,315,143\"}]"}

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