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.
Blue Planet-Open Ocean. The open ocean is often referred to as a marine desert.. This may seem contradictory to students, who perceive a desert as a hot, dry, sandy ecosystem.However, the biodiversity in the open ocean, away from the flow of nutrients from the coasts, is the lowest for all aquatic ecosystems.Key Concepts: Open ocean, aquatic ecosystems, euphotic zone, adaptations, migration, limiting factor.he open ocean is often referred to as a marine desert.. This may seem contradictory to students, who perceive a desert as a hot, dry, sandy ecosystem.