How are mountains made N°168 P.25

How are mountains made


maybe
all the snow that falls
makes huge heaps that
turn into mountains


*)  heap  ==> (noun) un tas, un amas, une masse
                        (verbe) entasser,  empiler


Let's go and see what
 the answer could be


So,  where do
mountains come
from ?


1)  The centre of the Earth is
made of a very hot liquid called
magma. Floating on top of this
magma is a thick layer of rock
called the Earth's crust. It covers
the whole of the Earth surface.

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But how are
mountains
made ?


2) The Earth crust makes
mountains. The crust is made
of several pieces called plates
that move very slowly.
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What happens
when the Earth's
crust moves ?


3) Sometimes,    two plates in
the Earth's crust crash into each 
other. The crust folds and pushes
upwards. After millions of years,
huge bumps form. These are
mountains!


*bump   ==> bosse, choc, coup


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Now I understand.
when plates in
the Earth's crust
crash into each other,
they form bumps that
we call mountains !