Answer:
The Columbian Exchange refers to the exchange of diseases, ideas, food e Columbian Exchange refers to the exchange of diseases, ideas, food
crops, and populations between the New World and the Old World rops, and populations between the New World and the Old World
following the voyage to the Americas by Christo ollowing the voyage to the Americas by Christopher Columbus in 1492. pher Columbus in 1492.
The Old World—by which we mean not just Europe, but the entire Eastern he Old World—by which we mean not just Europe, but the entire Eastern
Hemisphere—gained from the Columbian Exchange in a number of ways. Discov- emisphere—gained from the Columbian Exchange in a number of ways. Discoveries of new supplies of metals are perhaps the best known. But the Old World also ries of new supplies of metals are perhaps the best known. But the Old World also
gained new staple crops, such as potatoes, sweet potatoes, maize, and cassava.
Explanation:
The Earth's rocky outer crust solidified billions of
years ago, soon after the Earth formed. This crust is not a solid
shell; it is broken up into huge, thick plates that drift atop the soft,
underlying mantle.
The plates are made of rock and drift all over the globe; they move both
horizontally (sideways) and vertically (up and down). Over long
periods of time, the plates also change in size as their margins are
added to, crushed together, or pushed back into the Earth's mantle. These plates are from 50 to 250 miles (80 to 400 km) thick.
Answer:
It's the big flat continent at the bottom.
