Unit 4: Minerals and rocks                                                       1   2   3   4

 

 

3.1. Magmatic rocks

  

   Magmatic or igneous rocks are formed as a result

   of the cooling and solidification of magma.

 

   Magma is the melted rocky material formed below

   the Earth's crust or mantle.

   There are two types of igneous rocks:

 

   - Plutonic (intrusive) rocks

     They form as magma cools slowly under the ground

     over thousands of years.

     As a result, the mineral crystals are large and well done.

 

   - Volcanic (extrusive) rocks

       They form as lava cools rapidly on the surface of the Earth.

      As a result, the mineral crystals are tiny.

 

 

Animation: Igneous rocks


READING ACTIVITIES

 

After reading the text, copy and answer the following questions into your notebook:

Remember: you must make complete sentences.

 

3.4. What is the difference between:

      a. plutonic or intrusive rocks and volcanic or extrusive rocks

      b. magma and lava

 

3.5. In which type of magmatic rock can you see mineral most clearly?

       Why?

 

   

1   2   3   4


   

  Wordreference

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  Wordreference games 

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  Merrian Webster

  (Visual dictionary)

 

  Infovisual

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  Eduplace

  (Glosario de C. Naturales)

 

  Linguaframe 1ESO

  (Science audio-glossary)

 

  Linguaframe 2ESO 

  (Science audio-glossary)

  

  Oodcast

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  Glossopedia

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  Web elements 

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  Eva Mª

  López Rodríguez

 

  Departamento

  Biología y Geología

 

  IES " J. S. Elcano"

  Sanlúcar de Barrameda