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اسم النطاق - seashells.ae

عنوان الموقع - Etisalat Module Library -

اذهب إلى الموقع - Etisalat Module Library -

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Brief facts about seashells:

A seashell or sea shell, also known simply as a shell, is a hard, protective outer layer usually created by an animal or organism that lives in the sea. Most seashells are made by mollusks, such as snails, clams, and oysters to protect their soft insides. Empty seashells are often found washed up on beaches by beachcombers. The shells are empty because the animal has died and the soft parts have decomposed or been eaten by another animal. A seashell is usually the exoskeleton of an invertebrate, and is typically composed of calcium carbonate or chitin. Most shells that are found on beaches are the shells of marine mollusks, partly because these shells are usually made of calcium carbonate, and endure better than shells made of chitin. Apart from mollusk shells, other shells that can be found on beaches are those of barnacles, horseshoe crabs and brachiopods.

Bailey-Matthews Shell Museum - The Bailey-Matthews National Shell Museum is a museum devoted to every aspect of seashells, conchology, and malacology, including the paleontological and archeological/anthropological aspects of the study of shells.

Marine biogenic calcification - Marine biogenic calcification refers to the production of calcium carbonate by organisms in the global ocean. Marine biogenic calcification is the biologically mediated process by which marine organisms produce and deposit calcium carbonate minerals to form skeletal structures or hard tissues.

Mollusk shell - The mollusc shell is typically a calcareous exoskeleton which encloses, supports and protects the soft parts of an animal in the phylum Mollusca, which includes snails, clams, tusk shells, and several other classes. Not all shelled molluscs live in the sea; many live on the land and in freshwater.

Ocean acidification - Ocean acidification is the ongoing decrease in the pH of the Earth's ocean. Over the past 200 years, the rapid increase in anthropogenic CO₂ production has led to an increase in the acidity of the Earth's oceans.

Seashell resonance - Seashell resonance refers to a popular folk myth that the sound of the ocean may be heard through seashells, particularly conch shells. This effect is similarly observed in any resonant cavity, such as an empty cup or a hand clasped to the ear.

Seashell surface , a mathematical construct.

Mollusc products

Mollusc shells

Zoology

Collecting