1. Explain what causes the Earth to drift apart? Explain.
Semester Week 12 and week 13 ( April 10-14, 2017)
Learning Target
By the end of class, I will be able to
identify and describe the earth’s composition by doing the simulation lab on “Building Pangea” and complete the lab activity worksheet
Essential Question
Explain what causes the Earth to drift apart? Explain.
Agenda
Reading Fluency Rate
DOF
Four-Square Vocabulary
Earth’s composition
- Pangaea lab
Homework
Charge your I-pad fully everyday before coming to class
Complete all assigned classwork on Canvas

2. Reading Fluency Rate Week 12 CPO Focus on Life Science Textbook
Page 245
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par
Page par
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3. DOF – The Composition of the Earth
The Earth is divided into three layers- the crust, mantle and core. The crust is the outermost layer ranging from 5 to 100 kilometers thick. It is made up of a layer called the lithosphere. The lithosphere (rock sphere)is not a single layer but is made up pieces called tectonic plates.
The mantle is the layer of the Earth between the crust and the core. It is about 2,900 km thick and contains most of the Earth’s mass. The layer that makes up the mantle is called the asthenosphere(weak sphere), a soft layer of mantle in which pieces of the lithosphere moves. This layer is made up of solid rock that flows very slowly, like putty and tend to lose their shape when stressed. The mesosphere(middle sphere) is the strong lower part of the mantle.
The core extends from the bottom of the mantle to the center of the Earth. It has a diameter of 6,787 km and it’s 33 percent of the Earth’s mass. The core of the Earth is divided into two parts. The outer core is the liquid layer and surrounds the inner core. The inner core is a solid, dense center of our planet.

4. II. Concept Map (sample)
What is the text structure of the paragraph?
I. Text Structure
II. Concept Map (sample)
III. Summary

5. Composition of the Earth
Vocabulary - Week 12

6. crust Pangea mantle lithosphere
Sem 2 Week 12 : The Composition of the Earth
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Pangea
(n)
lithosphere
(n)
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crust
(n)
mantle
(n)
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7. Friendly Definition
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7-up Sentence
- an ancient supercontinent that broke apart to form today’s continents.
Pangea
Pangea
reminds me of…
because…
Alfred Wegener theorized and named the initial supercontinent Pangaea.
Connection

8. Friendly Definition
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7-up Sentence
- the outer most, rigid layer of the earth that consists of the crust and the rigid, uppermost part of the mantle
lithosphere
lithosphere
reminds me of…
because…
The Earth’s lithosphere is broken into continental plates that move over time.
Connection

9. Friendly Definition
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- the thin, outermost layer of the Earth, or the uppermost part of the lithosphere
crust
Crust
reminds me of…
because…
The crust is the outermost solid shell of a rocky planet.
Connection

10. mantle the layer of the earth between the crust and the core
Friendly Definition
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7-up Sentence
the layer of the earth between the crust and the core
mantle
mantel
remind me of…
because…
The composition of the Earth’s mantle is: oxygen, magnesium, silicon, iron, calcium, aluminum, sodium and potassium.
Connections -

11. core Plate tectonics mesosphere asthenosphere
Sem 2 Week 12 : The Composition of the Earth
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Plate tectonics
(n)
asthenosphere
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core
(n)
mesosphere
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12. The asthenosphere lies in the upper portion of the Earth’s mantle.
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the partially molten layer of the upper mantle on which the tectonic plates of the lithosphere move.
asthenosphere
asthenosphere
remind me of…
because…
The asthenosphere lies in the upper portion of the Earth’s mantle.
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13. Friendly Definition
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- Huge pieces of the lithosphere that move around on top
plate tectonics
Plate tectonics
reminds me of…
because… .
Connection

14. Mesosphere is in the mantle region of the Earth.
Friendly Definition
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7-up Sentence
the rigid, lower part of the mantle between the asthenosphere and the outer core
mesosphere
mesosphere
remind me of…
because…
Mesosphere is in the mantle region of the Earth.
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15. core The core of the Earth is solid and liquid iron.
Friendly Definition
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the central, spherical part of the Earth below the mantle
core
Core
remind me of…
because…
The core of the Earth is solid and liquid iron.
Connections