How are the land area and the oceans affected during an ice age

The land was frozen everywhere and a part of the ocean froze over to create a bridge between two countries. Some people may disagree with me over the ice bridge, though.

Well, if the ice falls on the land and water which can damage a lot of things. Also that when it melts, it makes the ocean a bit bigger and the land smaller. And if a huge chunk of ice breaks off, it can cause the ocean waters to rise and form huge waves.