¿y el cerebro?

En el laboratorio, vimos las partes del cerebro y lo cortamos para ver por dentro

What those 4 vídeos talks about?

We saw 4 vídeos two of them show as how a tsunami was, The destructive ot could be, how could we realise that a tsunami will started. You a can realise this when the sea start to move backwards. The other vidos explains how a volcano makes an eruption, when a destructive plates start to move that movement produce warm air and makes the volcano erupt.