The was the
widespread transfer of plants, animals, culture, human
populations, technology, diseases, and ideas between the
New World and the Old World in the 15th and 16th
centuries.

Amountain created from tectonic activity would be considered which type of landform ? a) primary landform b) secondary landform

Which statement explains what upwelling causes? a. upwelling causes tides to rise and fall. b. upwelling causes changes in the direction of currents. c. upwelling causes nutrients, minerals, and tiny organisms to rise. d. upwelling causes currents in the pacific ocean to change direction. i think the answer is c.

Which of the following can scientists estimate geologic time? a.observing rock sequences b.radiometric dating c.comparing fossils d.all of these