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Early seismolgists studying the travel times of seismic waves discovered that Earth has an inner and an outer core.
It is an educational content of CK-12 Foundation (to access some of the CK-12 content ...
Hipervinculo Lengua y literatura
We give you the parts. You tell us what it is.
It is an educational content by JetPunk, site that contains a wide variety of quizzes.
Hipervinculo Geografía
Animaciones y textos en inglés diseñados para aprender sobre como está formada la corteza terrestre. 'To learn about the Earth's crust and how it was formed'. The Earth's crust es un recurso educati ...
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