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Thursday January 31, 2013 (Classification of Igneous Rocks; Begin Lab – Igneous Rocks)
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The Launch Pad Thursday, 1/31/13 Provide the following information for the igneous rocks shown in the pictures: place of formation, crystal size (texture), cooling rate. intrusive large slow extrusive small fast extrusive microscopic glassy extremely fast granite andesitepumice
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Announcements Happy Inspire Your Heart with Art Day!
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Announcements I will be available after school today until 4:45.
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Assignment Currently Open Summative or Formative? Date IssuedDate Due Date Into GradeSpeed Final Day Quiz 16S11/18 1/242/7 WS – Igneous Rocks F61/282/1 TOMORROW WS – Bowen’s Reaction Series F71/292/1 TOMORROW
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Recent Events in Science Private Space Plane Poised for Big Test Flight Read All About It And Watch the Video! www.space.com/19551- dream-chaser-space-plane- flight-test.html A private space plane is slated to fly on its own for the first time in the next six to eight weeks, a key drop-test milestone in the vehicle's quest to fly astronauts on roundtrip space missions. The Dream Chaser spacecraft, built by aerospace firm Sierra Nevada Corp., will be released by a carrier helicopter at an altitude of 12,000 feet (3,657 meters) or so, then fly back and land autonomously on a runway at NASA's Dryden Flight Research Center in California. The unmanned 30-second drop test will kick off a series of trials that culminate in trips to low-Earth orbit and back, potentially paving the way for contracted, crew-carrying flights to the International Space Station for NASA, company officials said during a press conference today (Jan. 30)
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Classification of Igneous Rocks Figure 3.9
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Granitic igneous rocks are composed almost entirely of light-colored silicates, quartz and feldspar. They are also referred to as felsic rocks, feldspar and silica (quartz.) Granitic rocks have a high silica content, about 70%. Obviously, the most common rock granitic rock is granite.
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Granite Figure 3.11
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Basaltic igneous rocks contain substantial amounts of dark silicate minerals and calcium-rich plagioclase feldspar. Basaltic igneous rock are also referred to as mafic; they contain magnesium and iron. The most common basaltic rock is basalt.
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Basalt
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Other igneous rocks groups include: Andesitic (intermediate) Ultramafic
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Common Igneous Rocks
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Lab Igneous Rocks
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Key for Igneous Rocks Lab
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