1. Thursday January 31, 2013 (Classification of Igneous Rocks; Begin Lab – Igneous Rocks)

2. 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

3. Announcements Happy Inspire Your Heart with Art Day!

4. Announcements I will be available after school today until 4:45.

5. 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

6. 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)

7. Classification of Igneous Rocks Figure 3.9

8. 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.

9. Granite Figure 3.11

10. 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.

11. Basalt

12. Other igneous rocks groups include: Andesitic (intermediate) Ultramafic

13. Common Igneous Rocks

14. Lab Igneous Rocks

15. Key for Igneous Rocks Lab