Download L1: Continental Drift and Layers of the Earth Goals: to describe the

SCIENCE 8
Plate Tectonics
NAME: ___________________________
BLOCK: ____ DATE: _________________
L1: Continental Drift and Layers of the Earth
Goals: to describe the layers of the Earth
to explain the Continental Drift hypothesis
Key Words: continental drift, Pangaea, crust, mantle, outer core, inner core, lithosphere, asthenosphere, tectonic
plates
Refer to BC Science Connections page 277 for the answers to the following:
EARTH’S COMPOSITION
The circle below represents a cross-section of Earth. Draw and label Earth’s various layers. Define them in your
own words.
Vocabulary: crust, mantle, outer core, inner core.
outer core:
crust:
inner core:
mantle:
Questions:
1. a) How do scientists know what Earth’s inner layers look like when they can’t see them or use tools to probe
that deep?
2. Refer to page 290 and add the following layers to your diagram: lithosphere, asthenosphere. Define below:
Lithosphere:_________________________________________________________________________________
Asthenosphere:______________________________________________________________________________
Turn page over
3. What are tectonic plates and how are they related to the lithosphere?
Read pages 274-276 (and refer to your movie sheet) to answer the following:
1) What is meant by “fixism”?
2) In your own words, describe the continental drift hypothesis.
3) a. How did Wegener support his hypothesis?
b. Why do you think Wegener chose the information that he did?
4) a. Why was the continental drift hypothesis rejected by the scientific community ?
b. What discoveries helped support his hypothesis when it was revisited?
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