Purpose: For boats to safely cross different bodies of water due to density
How it works: There are different densities for bodies of water. If you were to sail from the St. Lawrence River to the Atlantic Ocean, the water densities would be different. The Atlantic Ocean would have higher density than the St. Lawrence River.
This could be because:
1) The Atlantic Ocean is denser because it is salt water and the St. Lawrence River is fresh water. It is denser due to the salt in the ocean which adds to its mass.
2) The temperature of the water could also affect its density. If the Atlantic Ocean is colder than the St. Lawrence River, than it will be denser.
They use a lock to help the boats cross different bodies of water because of the different densities. It levels less dense water level to the denser water level so the boat is able to transport across the bodies of water.
This could be because:
1) The Atlantic Ocean is denser because it is salt water and the St. Lawrence River is fresh water. It is denser due to the salt in the ocean which adds to its mass.
2) The temperature of the water could also affect its density. If the Atlantic Ocean is colder than the St. Lawrence River, than it will be denser.
They use a lock to help the boats cross different bodies of water because of the different densities. It levels less dense water level to the denser water level so the boat is able to transport across the bodies of water.
~Tiff
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