1. Use the words in the box to answer each question.
cowrie shells
barter
transaction
precious metals
currency
resource
base metals
a) What material was used to make the first coins?
b) What was the longest and most widely used currency in the world?
c) What is a word for an exchange of goods for money?
d) What is a material from nature that people need to survive?
e) What material was used by powerful empires to make coins?
f)
What is a medium for trade?
g) What is the direct exchange of goods or services?