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Our names are Arula and Ainoa, and we are going to talk about gypsum.

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Gypsum form deep underwater when creatures like gums, oysters, scallops, and surf fish die.

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They remain into the ocean flooring layer.

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Over time, hundreds of layers push down on the top of the original layer.

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This causes it to be turned into rock.

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Some of this rock contains gypsum.

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Gypsum is a very soft material.

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It can be scratched with your fingernail.

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We use gypsum used to make medical gauze.

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They put this on you when you break a bone.

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Manufactured on wild food.

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Plaster.

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Ferment.

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I hope you like our presentation.

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Thanks for your attention.