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Would you believe that Earth has something in common with a
mug of hot cocoa? It’s true.
When you hold a steaming mug of cocoa, heat flows from
the chocolate drink to your hands. The same thing happens
inside Earth. Heat flows from the core to the mantle.
All that heat warms up the magma at the bottom of the
mantle. And that causes the magma to move up toward Earth’s
surface. At the same time, cooler magma sinks down to take its
place. Over millions of years, magma slowly circles through the
mantle.
What does moving magma have to do with rocks? Keep on
reading to find out.
Q:
Why does magma
move in circles?
A:
It doesn’t want
to be square.
Magma on
the Move
