Granite and rhyolite are both igneous
rock made of feldspar, quartz, and
mica crystals. Why are they
classified into two different groups?

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

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explanation:

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