1. Quelle est la discontinuité qui sépare la croûte du manteau dans la structure interne de la Terre ?
2. À quelle profondeur se trouve la discontinuité de Gutenberg, séparant le manteau du noyau terrestre ?
3. Quelle est la fonction principale des enveloppes terrestres principales ?
Terre — troisième planète ?
Oui, du système solaire.
Diamètre de la Terre ?
12 800 km.
Modèle PREM — enveloppes ?
Croute, manteau, noyau externe, interne.
Discontinuités majeures ?
Moho, Gutenberg, Lehman.
Ondes P — propagation ?
Compression, rapides.
Ondes S — propagation ?
Cisaillement, pas dans liquides.
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