What physical features make up the natural boundaries between the United States and Canada?

What natural features do you see on this map?

http://images.nationmaster.com/images/motw/americas/canada_pol_94.jpg

I see several lakes.

Right. What are these lakes called?

Do you see the river that forms part of the boundary in the east?

I believe they are called the Great Lakes.

You are right!

The Great Lakes that form the border are Lake Superior, Lake Huron, Lake Erie, and Lake Ontario.

The river is the St. Lawrence River.

My answer: The physical features in which make up the boundaries between the United States and Canada are the Great Lakes, which consists of Lake Superior, Lake Huron, Lake Erie, and Lake Ontario, and the St. Lawrence River.

Right!

Thank you.

You're welcome.

The natural boundaries between the United States and Canada are primarily defined by five physical features:

1. The Great Lakes: The Great Lakes, which include Lake Superior, Lake Michigan, Lake Huron, Lake Erie, and Lake Ontario, form a significant portion of the boundary between the two countries. These vast bodies of water serve as a natural barrier, though they are not completely impassable.

2. St. Lawrence River: The St. Lawrence River acts as a natural boundary between the provinces of Ontario and Quebec in Canada and the state of New York in the United States. It is an important waterway that connects the Great Lakes to the Atlantic Ocean.

3. The Rocky Mountains: This mountain range stretches from British Columbia in Canada down to the southwestern United States. While not a continuous boundary, the Rocky Mountains do form a physical barrier between the two countries in certain regions.

4. The 49th Parallel: The 49th parallel of latitude serves as the boundary between the United States and Canada for a significant portion of the continental border. It was established by the Oregon Treaty in 1846 and runs from the west coast to the Lake of the Woods in Minnesota.

5. The Alaska-Yukon Border: The border between the state of Alaska in the United States and the Canadian territory of Yukon is formed by a combination of natural features, including mountain ranges such as the St. Elias Mountains and the Coast Mountains.

To visually explore these natural boundaries, you can simply refer to maps or satellite imagery of the United States and Canada. Additionally, there are numerous online resources that provide detailed information about specific sections of the border.