1.
religious self-determination
political advancement
adventure
wealth
2.
taxes en route
distance they had to be brought
frequent loading and unloading
production difficulties
danger from pirates and robbers
3.
by land across China through the Middle East
by water across the Mediterranean
by land to the Red Sea or Persian Gulf
by water to India and China
4.
It employed average sailors as teachers.
It employed the best map makers available.
5.
Extremely high prices were caused by the difficulty of moving Eastern goods to Europe.
Ships traveling water routes could carry more goods.
Traders refused to carry silk or cinnamon.
6.
compass
astrology
