Asia is a very big place. 
Asia is a very large land. 
Many islands are in the southeast. These are part of a nation called Indonesia. 
In the north, the Arctic Ocean is a border. To the east, the Bering Straits separate Asia from North America.
Long ago, people saw the land by its shores. They used ships to find the way. They stayed near the coast to stay safe.
Asia is a place full of many wonders.
Asia is a very large continent. 
To the north, the Arctic Ocean is the border. To the east, the Bering Straits separate Asia from North America. In the southeast, you will find many islands. 
Long ago, people learned about Asia by sailing near the coast. 
Asia is a huge continent with many different parts. 

Defining where Asia ends and other places begin is a big job. Geographers use different rules to draw these lines. Some look at the land, while others look at the sea. For instance, the border with Europe starts near the eastern Mediterranean coast. This border runs through the Black Sea and the Caucasus Mountains. It also follows the Ural River and the Ural Mountains to the Kara Sea. 
Long ago, people learned about Asia by sailing along the coasts. 

Ancient writers shared many different ideas about the world. A historian named Herodotus was very surprised by these divisions. He wondered why people gave three different names to the land. 
Today, we use many tools to understand Asia's many regions. We can look at climate maps to see how weather changes.
Asia is a massive continent that covers a huge part of the Earth. 

Defining the edges of Asia depends on the specific rules being used. For example, the border between Asia and Africa is marked by the Suez Canal and the Red Sea. However, the Middle East includes parts that are in Asia and parts that are in Africa. Some people include Egypt in the Middle East, but Egypt is not part of the continent of Asia. In the southeast, the Malay Peninsula marks the end of mainland Asia. Beyond that lies Indonesia, a vast nation made of thousands of islands. These islands sit on the Sunda Shelf. The border between Indonesia and Australia is still being negotiated today. This is because leaders must decide on rights for the water and the seabed. 
Geologists look at the world through the lens of plate tectonics. This is the study of the massive plates of rock that make up the Earth's crust. Under this scientific view, Asia is part of the much larger Eurasian Plate. This plate also includes the continent of Europe. However, other tectonic plates are located within the general area of Asia. These include the Arabian Plate and the Indian Plate. Because of these moving plates, some geographers argue that parts of Asia are actually distinct landmasses. For instance, South Asia and East Asia could be seen as separate geological regions.
Our modern understanding of Asia has deep roots in ancient history. In Archaic Greece, thinkers first began to divide the world into three parts. They called these parts Asia, Europe, and Libya. 

Other ancient thinkers provided different ways to explain the world. The geographer Strabo suggested that continents were separated by seas. He believed that as sailors passed through certain straits, the different shores appeared on either side. Later, a Roman-era geographer named Ptolemy refined these ideas. Ptolemy distinguished between geography and chorography. Geography was the study of the whole known world. Chorography was the more detailed study of specific places. Ptolemy believed that seas made better borders than rivers. He also used the name Libya to describe the continent of North Africa.
Asia's size is difficult to measure exactly because different sources use different methods. The New York Times Atlas of the World and the Chambers World Gazetteer provide different estimates for its area. Mainland Asia stretches across a vast distance of latitude and longitude. It spans about 77 degrees of latitude and 165 degrees of longitude. Indonesia adds even more territory to the continent because of its many islands. These islands extend the southern reach of Asia much further than the mainland alone. This makes the total size of the Asian region very large and varied.
Today, we organize Asia into many different regions for study. We might talk about East Asia, South Asia, or the Middle East. We can also use climate maps to see how different environments work. 
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