Unit C: The Changing Earth
Chapter 1: The Abyss of Time
Key Concepts
1.1 The Long Beginning
Read pages 296 – 301
1. Jot note the definition of each. Use diagrams and give examples if possible.
Slave Granite
Precambrian
Shield
Canadian Shield
Precambrian Era
Outcrop
Core
Inner core
Outer core
Mantle
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Unit C: The Changing Earth
Plastic
Asthenosphere
Mesosphere
Lithosphere
Oceanic crust
Continental crust
Indirect evidence
Nuclear decay
Convection
Crustal plates
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Unit C: The Changing Earth
Convergent
boundary
Divergent
boundary
Transform faults
Plate tectonics
Mid-0ceanic
Ridge
Sea-floor
spreading
Core samples
Paleomagnetism
Reversed
magnetic
alignments
2. Why is the oceanic crust pushed under the continental crustal plate instead of
vice versa?
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Unit C: The Changing Earth
3.
4. On your own paper, do page 301 # 1, 2, 5, 6, 7
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