1. ARIZONA STATE SCIENCE STANDARDS: GRADE LEVEL 7
EARTH’S LAYERS
ARIZONA STATE SCIENCE STANDARDS: GRADE LEVEL 7
Strand 6: Earth and Space Science
Concept 2: Earth’s Processes and Systems
Understand the processes acting on the Earth and their interaction with the Earth systems.
PO 3. Analyze the evidence that lithospheric plate movements occur.
PO 4. Explain lithospheric plate movement as a result of convection.

2. Students will be able to recognize and name layers of the Earth
EARTH’S LAYERS
DAILY OBJECTIVE:
Students will be able to recognize and name layers of the Earth

3. TWO TYPES OF EVIDENCE:
Collecting data by measuring seismic waves created by earthquakes from around the world.

4. TWO TYPES OF EVIDENCE:
Collecting data by examining rock samples driven to the surface of the Earth.

5. Layers of the earth: Crust
Layer of rock that form Earth’s outer skin
Thinnest layer of Earth, and least dense
Includes land forms, soil, water, all life on earth

6. Types of Crust Oceanic: All of the ocean floors
Continental: Includes all continents and islands

7. Layers of the earth: MANTLE
Layer of hot, solid rock just below the Earth’s crust
Thickest layer of Earth, and more dense than the crust
Two kinds:
Lithosphere
Asthenosphere

8. Types of Mantle Lithosphere
Rigid layer of the upper most part of the mantle and lower part of the crust
Made up of large and small slabs of tectonic plates

9. Types of Mantle Asthenosphere Under the lithosphere
Softer and hotter rock is located here
Flows slowly like hot tar

10. Layers of the earth: outer core
Composed of liquid iron and nickel
Temperature, pressure, and density here are lower than in the inner core; that is why this layer is a liquid

11. Layers of the earth: Inner core
Solid layer of nickel and iron
Highest temperature, pressure, and density

12. Layers of the earth: video
Core of the Earth Video

13. Lithosphere & Asthenosphere

14. Mantle
Lithosphere
Asthenosphere
Crust
Outer Core
Inner Core