answers part one

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

PAGE 51

• 3.C. i. > Large cube 1 cm28 small cubes – approx 8 cm2-more area

C. ii. > Small cubes cool faster

C. iii. > small mass losses heat faster

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

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

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

Go right to excersice

• Felsic-dense spotty material to the left

• Intermediate

• Mafic –less dense percentages to the righ

Lets all go to the do now-we will come back to this

• Can use page 58 to complete this and hand directly in

Felsic

• white mica" (muscovite• Quart • K –feldspar• biotite

felsic

mafic

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

mafic