Well, Columbus never actually came to America. His ship made land in the Bahamas and Cuba. He thought these islands were Asian islands because the people of Spain were unaware of the Americas, and so he wanted gold. He returned to his country and came back with more men. And killed a lot of people.
Anyway, for the sake of the American education system, I'm assuming the word the teacher is wanting is something like "recognized".
"<span>Los geólogos a menudo necesitan saber la edad del material que encuentran. Usan métodos absolutos de citas, a veces llamados datación numérica, para dar a las rocas una fecha real, o rango de fechas, en número de años. Esto es diferente a la datación relativa, que sólo pone los eventos geológicos en orden cronológico.</span>" -GOOGLE
Industrialism happens when an industry is introduced on a large scale to a region or country. An example could be that on the Industrial Revolution, where an economy goes from being based on agriculture to being based on manufacturing and other industries.
DESERTIFICATION IS THE SPREAD OF DESERT AREA, AND IF PEOPLE WANT TO LIMIT THE EFFECT OF IT, SOME WAYS ARE TO STOP CUTTING DOWN TREES. DEFORESTATION IS A PART OF THE REASON THAT DESERTIFICATION TAKES PLACE. ANOTHER WAY,IS FOR PEOPLE TO STOP OVERGRAZING AND SLASH AND BURN.
(HOPE THIS HELPS)
