Page 91 - Science Course 2 (Book 2)

Mo10-L2: Key Concept Organizer

Direction: Answer each question in the space provided.

Question Answer
1 What are the three main layers of
Earth?

2 Which layer of the geosphere is
densest?

3 Which layer of the geosphere is
the least dense?

4 When did Earth’s layers form?

5 How did the temperature of early
Earth affects rocks?

6 Earth’s layers can be distinguished
by density and what other
property?

7 How did the temperature of early
Earth compare to Earth’s
temperature today?
8 What role did gravity have in
forming Earth’s layered structure?

Mo10-L2: Key Concept Check

Direction: Complete the crossword puzzle with the correct terms from the word bank.
asthenosphere cleavage core fracture
lithosphere mantle streak

Across
1. tendency of minerals to break along smooth, f at
surfaces

4. thick, rocky middle layer of the geosphere

6. brittle outer layer formed by the crust and
uppermost mantle

7. tendency for minerals to break along irregular
surfaces
Down
2. weak, partially melted layer of the mantle

3. color of a mineral’s powder

5. dense, metallic center of Earth

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