1. Page 51
• 3.
• A.> i. crust has greater surface area
• ii. > crust cools faster –has no concealed
center – a ball does!
• B. i. > plastic cools faster – does not hold heat
like styrofoam
• ROCK IS BETTER INSULATOR

2. PAGE 51
• 3.
C. i. > Large cube 1 cm2
8 small cubes – approx 8 cm2-more area
C. ii. > Small cubes cool faster
C. iii. > small mass losses heat faster

4. Exercise 3 -52
• Phaneritic- course-cooled slowly-should have
crystal-ions migrated slowly and formed
crystals-nucleation possible
• Aphaneritic-fine ( cools fast! Less time for Na+
to migrate-no crystal formation

5. Exercise 3- page 52
• A) same rock material
• Regions close together-
• 1st area cooled fast and was not viscous
• 2nd area –cooled slow –and was very viscous

6. Exercise 3- page 52
• 3-D –shallow INTRUSIVE IGNEOUS ROCKS
• -have-fine course grains
• Than DEEP INTRUSIVE IGENOUS ROCKS
• SHALLOW-INTRUSIVE-finer!!!
• Deep-intrusive-not finer or course –from thick
lava

7. Go right to excersice
• Felsic-dense spotty material to the left
• Intermediate
• Mafic –less dense percentages to the righ

8. Lets all go to the do now-we will come
back to this
• Can use page 58 to complete this and hand
directly in

9. Felsic
• white mica" (muscovite
• Quart
• K –feldspar
• biotite

10. felsic

11. mafic
• Albite (plagioclase feldspar
• Olivine
• Augite --Pyroxene
• . Hornblende -amphilbole

12. mafic