How Are Pearls Formed?


Audición — Nivel Principiante
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Mira el vídeo y responde a las preguntas

  1. Pearls are the result of a biological process within living sea   .

  2. An oyster has   shells.

  3. Inside the shells, there is an   called mantle.

  4. Mantle covers and protects all the   organs of the oyster.

  5. The mantle's natural reaction is to   that foreign substance.

  6. Over time, layer upon layer of   leads to the formation of a pearl.


Practica tus habilidades de escritura debatiendo las siguientes cuestiones

  1. What would be at the center of the pearl (according to the video)?

  2. Do you own, or would you like to own, any gems? Which one(s) do you like best and why?


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