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.

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

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

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

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

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

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

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

Layers of the earth: video Core of the Earth Video

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

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

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

Lithosphere & Asthenosphere

Mantle Lithosphere Asthenosphere Crust Outer Core Inner Core