Date ________________________ Period ________________________ Name ________________________________________
The Precambrian Earth
SECTION 2 Formation of the Crust and Continents
MAIN IDEA
DETAILS
Skim Section 2 of your text. Read the headings and the figure captions.
Write three questions that come to mind.
1. _______________________________________________________________
2. _______________________________________________________________
3. _______________________________________________________________
Review Vocabulary
magma
New Vocabulary
differentiation
Use your text to define the following term.
________________________________________________________________
Use your text to define each term.
________________________________________________________________
________________________________________________________________
microcontinent
________________________________________________________________
craton
________________________________________________________________
Precambrian shield
________________________________________________________________
Canadian Shield
________________________________________________________________
Laurentia
________________________________________________________________
Academic
Vocabulary
illustrate
Define the following term.
________________________________________________________________
The Precambrian Earth
257
Name ____________________________________
SECTION 2 Formation of the Crust and Continents (continued)
MAIN IDEA
DETAILS
Formation of the Model the differentiation of Earth. Draw a cross section of Earth and label
Crust five layers. Use Figure 3 to help you.
Use with pages 623–624.
Analyze differentiation and the formation of the crust in the concept web
below.
The Cores of the Explain the cores of the continents by completing the following sentences.
Continents Continents contain a core of __________ and __________ rock called
Use with page 625.
a _____________________. The Precambrian shield of North America is
called the ______________. It is exposed in parts of __________,
__________, __________, Michigan, __________, and Greenland.
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258
Name ____________________________________
SECTION 2 Formation of the Crust and Continents (continued)
MAIN IDEA
DETAILS
Growth of Create cartoon-strip style sketches to show a chronology of the formation
Continents of Earth's surface as we now know it. Draw at least four frames. Include
events such as:
Use with pages 625–627.
• collision of microcontinents
• formation of Laurentia
• formation of microcontinents
• formation of Rodinia
• Grenville orogeny
• suturing at orogenies to produce larger continents
List four important developments of Earth by the end of the Proterozoic.
1. ______________________________________________________________
2. ______________________________________________________________
3. ______________________________________________________________
4. ______________________________________________________________
REAL-WORLD CONNECTION
Wegener mentioned Pangaea in his hypothesis about continental drift. Compare and contrast
Pangaea and Rodinia.
________________________________________________________________________________________
________________________________________________________________________________________
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259