Earth - plates moving around, showing motions deeper down
like boiling water - hot stuff comes to the top and cooler stuff goes down
can cause volcanoes (usually at plate boundaries)
BUT there's another way to get volcanoes:
hotter rock = flows more easily
this hot rock collects deep down
when you get enough, it pushes up to make a bulge (volcano) even though it's not at a plate boundary
this kind can create chains or islands of volcanoes - eg Hawaii
Then I'd go back and label my first
...
like boiling water - hot stuff comes to the top and cooler stuff goes down
can cause volcanoes (usually at plate boundaries)
BUT there's another way to get volcanoes:
hotter rock = flows more easily
this hot rock collects deep down
when you get enough, it pushes up to make a bulge (volcano) even though it's not at a plate boundary
this kind can create chains or islands of volcanoes - eg Hawaii
Then I'd go back and label my first
...
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