Learn on PengiCalifornia myWorld Interactive, Grade 5Chapter 2: Age of Exploration

Lesson 1: Early Explorers and Advances in Technology

In this Grade 5 lesson from California myWorld Interactive's Age of Exploration chapter, students learn how advances in navigation technology — including the astrolabe and the caravel — enabled European sailors to venture beyond coastal waters and seek sea routes to Asia. The lesson covers early explorers such as the Vikings and Leif Ericsson, the role of Portuguese Prince Henry's navigation school, and the growth of trade and the slave trade along African coastlines. Students also practice drawing conclusions from evidence about why European nations competed to find new ocean routes.

Section 1

Europeans Seek New Trade Routes to Asia

During the 1400s, wealthy Europeans developed a strong demand for luxury goods from Asia, especially spices like pepper and cloves, which were used to preserve and flavor food. The traditional overland trade routes that brought these goods to Europe were long and controlled by various merchants, making the final products extremely expensive for European buyers.

The expansion of the Ottoman Empire gave it control over the major land routes connecting Asia to the Mediterranean. From there, Italian city-states held a monopoly on the trade, driving prices even higher. This economic pressure motivated Atlantic nations, particularly Portugal, to finance voyages and develop new technologies. Their goal was to find a direct sea route to Asia, bypassing the old trade networks to gain access to the sources of Asian wealth.

Section 2

Portugal Leads the Search for a Sea Route

Key Idea

The country of Portugal became the leader in the search for a sea route to Asia. A Portuguese ruler named Prince Henry the Navigator was a key reason for this. He wanted his country's sailors to find a new path to the riches of Asia.

Around 1419, Prince Henry started a school for navigation. At this school, sailors, mapmakers, and shipbuilders worked together. They shared knowledge to improve their ships and sailing skills. This helped Portuguese explorers begin making long voyages down the coast of Africa.

Section 3

Technology for Exploration: New Tools for the Sea

Key Idea

New inventions helped sailors navigate long, dangerous ocean voyages. The compass always pointed north, so sailors knew their direction even when they could not see land.

Sailors also used the astrolabe to measure the position of the stars. This tool helped them figure out how far north or south they had traveled from their starting point.

Section 4

Portuguese Explorers Expand the Slave Trade

Key Idea

As Portuguese explorers sailed down the coast of Africa, they built forts and trading posts. At first, they traded European goods for African resources like gold and ivory.

Soon, this trade grew to include enslaved people. The Portuguese began capturing and buying Africans, forcing them into slavery. This made the slave trade a major, cruel business that brought wealth to Portugal.

Lesson overview

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Section 1

Europeans Seek New Trade Routes to Asia

During the 1400s, wealthy Europeans developed a strong demand for luxury goods from Asia, especially spices like pepper and cloves, which were used to preserve and flavor food. The traditional overland trade routes that brought these goods to Europe were long and controlled by various merchants, making the final products extremely expensive for European buyers.

The expansion of the Ottoman Empire gave it control over the major land routes connecting Asia to the Mediterranean. From there, Italian city-states held a monopoly on the trade, driving prices even higher. This economic pressure motivated Atlantic nations, particularly Portugal, to finance voyages and develop new technologies. Their goal was to find a direct sea route to Asia, bypassing the old trade networks to gain access to the sources of Asian wealth.

Section 2

Portugal Leads the Search for a Sea Route

Key Idea

The country of Portugal became the leader in the search for a sea route to Asia. A Portuguese ruler named Prince Henry the Navigator was a key reason for this. He wanted his country's sailors to find a new path to the riches of Asia.

Around 1419, Prince Henry started a school for navigation. At this school, sailors, mapmakers, and shipbuilders worked together. They shared knowledge to improve their ships and sailing skills. This helped Portuguese explorers begin making long voyages down the coast of Africa.

Section 3

Technology for Exploration: New Tools for the Sea

Key Idea

New inventions helped sailors navigate long, dangerous ocean voyages. The compass always pointed north, so sailors knew their direction even when they could not see land.

Sailors also used the astrolabe to measure the position of the stars. This tool helped them figure out how far north or south they had traveled from their starting point.

Section 4

Portuguese Explorers Expand the Slave Trade

Key Idea

As Portuguese explorers sailed down the coast of Africa, they built forts and trading posts. At first, they traded European goods for African resources like gold and ivory.

Soon, this trade grew to include enslaved people. The Portuguese began capturing and buying Africans, forcing them into slavery. This made the slave trade a major, cruel business that brought wealth to Portugal.