Ch 13 Concepts questions.docx

Quartz commonly colorless forms six sided elongated

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Quartz: Commonly colorless; forms six-sided elongated crystals. 5. Describe the general differences among igneous , sedimentary , and metamorphic rocks . An igneous rock is a rock formed by solidification of molten magma. Sedimentary rock is a rock formed of sediment that is consolidated by the combination of pressure and cementation. Metamorphic rock is a rock that has been drastically changed by massive heat, pressure, and/or hydrothermal fluids that worked on it from within the Earth. 6. Briefly define the following terms: magma , lava , pyroclastics . Magma: Molten material below the earth's surface Lava: Molten magma that is extruded onto the surface of Earth, where it cools and solidifies. Pyroclastics: Solid rock fragments thrown into the air by volcanic explosions 7. What is the difference between a plutonic (intrusive) igneous rock and a volcanic (extrusive) igneous rock ? A plutonic rock is an igneous rock formed below ground from the cooling and solidification of magma. A volcanic rock is formed on the surface of the earth 8. What are the main differences between granite and basalt ? Granite is the most common and well-known plutonic rock which forms from felsic magma. Basalt is a fine- grained dark volcanic rock which forms from cold lava 9. How is sediment formed? Sediment is formed by both mechanical and chemical external processes operating on rocks. This disintegration produces fragmented mineral material (sediment) some of which is removed by ice, gravity, wind and water.
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
10.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern