Other Chapters' Lyrics:

Earth Science 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 -:- Life Science 1 - 2 - 3 - 3b - 4 - 4b - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 -:- Physical Science 3

Other Chapters' Notes:

Earth Science 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 -:- Life Science 1 - 2 - 3 - 3b - 4 - 4b - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 -:- Physical Science 3

 

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Earth Science Chapter 4 - Chapter Notes

 

Š      Rock is a solid mixture of crystals of one or more minerals.  Some rocks, such as coal, are made from organic materials.

Š      The rock cycle is a process by which one rock type changes to another.

Š      Rocks are classified into sedimentary rocks, metamorphic rocks, and igneous rocks.

Š      Rocks can be further categorized by composition.  For example, limestone’s composition is 95% calcite and 5% aragonite.

Š      Deeper in the earth’s crust, it is so hot that rocks can melt to form magma.  Cooled magma turns back into a solid rock that we call igneous rock.

Š      The igneous rock inside the earth is intrusive.  The igneous rock on the surface is extrusive.  Volcanic rocks are made from extrusive rocks.

Š      Lava does not always come from volcanoes.  Sometimes it erupts from long cracks in the Earth’s surface called fissures.

Š      Sedimentary rock is naturally compacted in layers called strata.  The Grand Canyon contains strata.

Š      Sedimentary rock can come from living things.  Limestone in the sea is made of the remains of tiny organisms called coral.

Š      Metamorphic rocks are those that have undergone change from pressure, heat, or both.  Foliated metamorphic rock consists of minerals aligned to look like pages in a book.  Nonfoliated metamorphic rock has no regular pattern.