CK12 Earth Science
Figure 4.14: Obsidian is an extrusive igneous rock. It cools so rapidly that crystals do not form, and it has a glassy texture. ...
Composition Igneous rocks are classified according to how and where they formed (in other words, if they’re intrusive or extrusi ...
Figure 4.16: Rhyolite is an example of an extrusive felsic rock. Notice its light color and small crystals. ( 23 ) Figure 4.17: ...
Figure 4.18: This vase was made by ancient Egyptians about 3,600 BC. It is made of the igneous rock diorite. ( 3 ) ...
Describe two ways granite is different from basalt. List three common uses of igneous rocks. Occasionally, igneous rocks will c ...
Introduction Figure 4.19: The White House of the United States of America is made of a sedimentary rock called sandstone. ( 15 ) ...
Most sediments settle out of water (Figure4.20). For example, running water in rivers carries huge amounts of sediments. The riv ...
into rocks throughcompaction.This occurs when sediments are squeezed together by the weight of layers on top of them. Sedimentar ...
Table 4.2: (continued) Picture Rock Name Type of Sedimentary Rock Breccia Clastic Sandstone Clastic Siltstone Clastic Shale Clas ...
Table 4.2: (continued) Picture Rock Name Type of Sedimentary Rock Rock Gypsum Chemical precipitate Dolostone Chemical precipitat ...
hardened mud. Lesson Summary Weathering and erosion produce sediments. Once these sediments are deposited, they can become sedi ...
Points to Consider If you were interested in learning about Earth’s history, which type of rocks would give you the most inform ...
Figure 4.22: The platy layers in this large outcrop of metamorphic rock show the effects of pressure on rocks during metamorphis ...
mineral crystals is the most common way that we notice these changes. Table4.3shows some common metamorphic rocks and the origin ...
Table 4.3: (continued) Picture Rock Name Type of Metamor- phic Rock Comments Quartzite Non-foliated Metamorphism of sandstone Ma ...
Figure 4.24: Marble is used for decorative items and in art. ( 8 ) Figure 4.25: Crushed quartzite is sometimes placed under rail ...
Review Questions Why do the minerals in a rock sometimes rearrange themselves when exposed to heat or pressure? What is foliati ...
(6) http://en.wikipedia.org/wiki/Image:James_Hutton.jpg. GNU-FDL. (7) http://commons.wikimedia.org/wiki/Image:Igneous_structures ...
Chapter 5 Earth’s Energy 5.1 Energy Resources. Lesson Objectives Compare ways in which energy is changed from one form to anoth ...
Figure 5.1: Electrical transmission towers like the one shown in this picture help deliver the electricity that you use for ener ...
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