the amount of something that covers the surface of an area; one of many levels or folds covering an area
Volcanoes are a good way to understand earth’s three layers.
slab
a thick, flat slice of something
The crust is made of huge slabs of rock called tectonic plates.
against
in conflict or DISAGREEMENT with
Sometimes plates push against or pull away from each other.
lava
hot, melted rock from inside the earth
When magma leaves the volcano, it’s called lava.
erupt
to come out violently
Volcanoes erupt when magma is squeezed up between two plates.
flow
to move easily and continuously in one direction
Lava flows on the crust.
squeeze
to press the sides together to get something to come out
My mom squeezed the oranges and made juice for us.
melt
to change from a solid to a liquid
Magma is super-hot melted rock and gases.
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