Grade 1 - A History Of The Earth

112 The History of the Earth: Supplemental Guide 6A | The Three Types of Rocks

Vocabulary Preview 5 minutes

Igneous

 Show image 6A-2: Granite surface

1. Today you will hear about three types of rocks. One type is
   called igneous rock.


2. Say igneous with me three times.


3. Igneous is a type of rock that forms when magma cools,
   hardens, and turns solid.


4. Isai’s house had countertops made of granite, a common
   igneous rock.
   Maribel explained to her mother that the word igneous came
   from the Latin word for “fi re.”
    Show image 6A-4: Half Dome, Yosemite National Park


5. This big igneous rock is called Half Dome, and it is located
   in Yosemite National Park in California. Describe this igneous
   rock to your partner.
   Sedimentary
    Show image 6A-10: Coal


6. Another type of rock is sedimentary rock.


7. Say sedimentary with me three times.


8. Sedimentary rock forms when layer upon layer of small, solid
   materials are pressed together.


9. Alexander explained to his friend that some sedimentary rock
   is made from decayed plants that have been under pressure
   for many years.
   [Point to the picture.] Coal is a type of sedimentary rock.
    Show image 6A-12


10. This type of sedimentary rock is called sandstone. Do you see
    the layers in the sandstone?