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A geologist faces down the idea that geological events only happen gradually. He shows that giant ice age floods ripped through the Pacific Northwest.
It is an educational content of CK-12 Foundation ( ...
Alfred Wegener collected a tremendous amount of data that continents could move. But not very many scientists believed him.
It is an educational content of CK-12 Foundation (to access some of the CK-12 ...
Hipervinculo Química
Explains the rules for rounding numbers and how banks round numbers.
It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).
Hipervinculo Inglés-Lengua extranjera
Cuatro pantallas en inglés orientadas a que el niño se familiarice con los conceptos de arriba y abajo ( up and down). "This sequence aims to work with concepts appropriate for Nursery Education". ...
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