Write a newspaper report on an accident .
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External forces are forces caused by external agent outside of the system. Internal forces are forces exchanged by the objects in the system.
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The Age of Exploration brought together peoplefrom Europe, Africa, Asia, and the Americas, often for the first time. When people meet, they often exchange something. It can be a thing (a piece of silk) or an idea (the way to make silk). It can even be a disease.
Two main types of exchanges took place during the Age of Exploration. Biological exchanges include living things such as plants, animals, and diseases. Cultural exchanges include goods, technology, and ideas.
The exchanges that began during this period affected the way people lived on every continent. You've already seen several examples of this impact in Chapter 33 of History Alive! The Medieval World and Beyond. Here we take a deeper look.