The columbain exchange is when the new world go to the old world and exchange things like food, ideas, religion, animals, people, and disease. The new world is north and south america, and the old world is Asia , Europe, and Africa.
If it want for the old world we would have ice. the reason we wouldn't have ice cream because the old world made vanilla and ice need vanilla to taste good.
If it wasn't for the new world we would have the things today that we us cows milk to make such as chocolate ice cream and more..
pumpkins came from the new into the old world. and the new world use it to make things like pumpkin pie and more.
the old world exchange fruit with the new world that's why Florida is known for it.
pineapple where traded from the old world to the new world that's how we got pineapple today.