Casement window, with latticed lights. A casement is a window that is attached to its frame by one or more hinges. Casement windows are hinged at the side. Windows hinged at the top are referred to as awning windows, and ones hinged at the bottom are called hoppers.
Open Systems. The ocean is an open system. The ocean is an example of an open system. The ocean is a component of the hydrosphere and the ocean surface represents the interface between the hydrosphere and the atmosphere that lies above. Solar radiation passes through the atmosphere and is absorbed by the ocean.
The open ocean refers to the large open expanses of ocean water. This vast area is the primary habitat for relatively few animals. Most of the food in the ocean is found nearer to shore, so most of these animals are just passing through. Some larger animals like whales and giant groupers may live their entire lives in the open water.