Advances in technology included the astrolabe and the (a)   . (compass/sail)

(a)   used triangular sails that, unlike traditional square sails, allowed ships to sail against the wind. (Astrolabes/Caravels)

Prince Henry the (a)   was responsible for much of Portugal’s success on the seas. (Navigator/Explorer)

. In 1498 (a)   sailed around Africa and landed on the west coast of India. (Ferdinand Magellan/Vasco da Gama)

Italian sailor (a)   thought he had found a shorter route to Asia. (Vasco da Gama/Christopher Columbus)

To circumnavigate means to sail all the way (a)   something. (to/around)

As (a)   studied new maps and laid claim to new lands, they saw the potential for great wealth. (Aztecs/Europeans)

English sailor Sir (a)   began stealing treasure from Spanish transport ships. (Francis Drake/Christopher Columbus)

In 1588 Spain sent 130 ships, called the (a)   , to attack England. (Fleet of Spain/Spanish Armada)