1. Lesson 3: A Route to the Sea
The Midwest has access to the 5 great lakes and many rivers that connect OR have been connected
Waterways make traveling or moving things on water easy
The fresh water of the great lakes is very valuable to the US
Locks and Canals connect many waterways
The St. Lawrence Seaway links the Great Lakes to the St. Lawrence River and then to the oceans. You can get anywhere from the middle of the USA!

2. 18,000 years ago glaciers covered the Midwest.
The Great Lakes
From largest to smallest they are:
Lake Superior--The largest freshwater lake in the world
Lake Huron
Lake Michigan
Lake Erie
Lake Ontario
18,000 years ago glaciers covered the Midwest.
As they moved across the land they gouged enormous holes in the land.
The glaciers melted and filled these giant holes with water.
This is how the Great Lakes were formed.

3. The Great Lakes

4. H. O. M. E. S. Remember HOMES to name the Great Lakes H Huron
O Ontario
M Michigan
E Erie
S Superior

5. The St. Lawrence Seaway
You can get from the middle of North America to any ocean using the interconnected rivers and lakes of the St. Lawrence Seaway min 54 sec

6. Rivers Midwest has many lakes and rivers
Ohio River forms the boundary between the Midwest and Southeast
Ohio River flows into the Mississippi River
Missouri River is the largest tributary of the Mississippi River

7. Ohio River

8. St. Lawerence Seaway

9. Mississippi River
Missouri River
Ohio River
The waterways created By connecting the large rivers of the Mississippi, Ohio and Missouri, we can get from the great lakes to the Gulf of Mexico

10. Its like an elevator for boats! Genius!
Locks
A lock is a gated part of a canal or river. Between the gates, water can be raised or lowered to allow for a boat to move from bodies of water with different water depths.
Its like an elevator for boats! Genius!
(54sc)

11. Barges
Barges are very large, shallow bottomed boats. They are used to move goods through the great lakes and along the big rivers. There are PROS and CONS of using barges.
PRO
You can move A LOT
Its Green. Little pollution a result of barges
Its cheap
CON
Its slow
Its not door to door

12. Summarizing the lesson…. Let’s review what we’ve learned!!!!