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El ciclo del oxígeno (The Oxygen Cycle)
The movement of oxygen from product of photosynthesis, through the human system, water, and Earth''s atmosphere is a scientific model called the oxygen cycle. And it''s essential …
Pueblos indígenas del Ártico (Native Peoples of the Arctic)
In the Arctic, survival is paramount. Yet, for thousands of years, people have made their home in present-day Canada and Alaska among the snow and ice. They value sharing and …
Pueblos indígenas de Las Grandes Llanuras (Native Peoples of the Great Plains)
For the native peoples of the Great Plains, history is broken into two periods: before horses arrived and after. The Spanish introduced horses to these native groups around 1540, …
Pueblos indígenas del Subártico (Native Peoples of the Subarctic)
Much of Canada and Alaska can be called the subarctic. This area features the taiga and often cold temperatures. The native peoples of this region had to adapt to this climate in …
Pueblos indígenas del Suroeste (Native Peoples of the Southwest)
The Apache, Navajo, and Pueblo peoples are often part of the social studies curriculum. However, they aren’t the only native groups that come from the American southwest! Readers …
El ciclo del nitrógeno (The Nitrogen Cycle)
There are many steps in the nitrogen cycle that include difficult concepts and words: denitrification, prokaryotes, ammonia, and more. With the help of this understandable book, …
Pueblos indígenas del Sureste (Native Peoples of the Southeast)
The American Southeast stretches from the Atlantic Ocean to the Gulf of Mexico, including the states of Georgia, Florida, Louisiana, and Alabama as well as parts of Virginia and …
Pueblos indígenas de la costa Noroeste (Native Peoples of the Northwest Coast)
The native peoples of the northwest coast are often known by the totem poles they create. Made from cedar trees, totem poles were painted bright colors and featured both animal and …
Pueblos indígenas del Noreste (Native Peoples of the Northeast)
A lot of what many people know about the native groups in the northeastern part of North America comes from colonial history. The Wampanoag met the Puritans as they made their home …