Presentation is loading. Please wait.

Presentation is loading. Please wait.

Earth has 2 types of layers or zones: - Compositional: what each layer is made of - Mechanical or Structural: physical characteristics about each layer,

Similar presentations


Presentation on theme: "Earth has 2 types of layers or zones: - Compositional: what each layer is made of - Mechanical or Structural: physical characteristics about each layer,"— Presentation transcript:

1

2 Earth has 2 types of layers or zones: - Compositional: what each layer is made of - Mechanical or Structural: physical characteristics about each layer, and how they respond to stress QUESTION: Look at this picture and describe how both sides individually classify the layers of the Earth. QUESTION: Look at this picture and describe how both sides individually classify the layers of the Earth.

3 <1% of Earth’s mass Earth’s crust is the thinnest layer. ◦ km thick Two types of crust :  Oceanic  Continental Oceanic  Made mostly of igneous basalt  Thin: 5-7 km  Contains more iron than continental crust. MAFIC Oceanic  Made mostly of igneous basalt  Thin: 5-7 km  Contains more iron than continental crust. MAFIC Continental  Found under continents.  Thick: up to 100 km  Made mostly of granite. FELSIC Continental  Found under continents.  Thick: up to 100 km  Made mostly of granite. FELSIC

4 QUESTION: Look at this picture and describe which type of crust (oceanic or continental) is the most dense and why. QUESTION: Look at this picture and describe which type of crust (oceanic or continental) is the most dense and why.

5 Earth’s mantle is directly above the outer core and starts blow the crust. It is the largest layer and relatively homogeneous. It is made of more iron than the crust. Density, pressure, and temperature all increase the deeper you go in the mantle. Heat is transferred through convection. Earth’s mantle is directly above the outer core and starts blow the crust. It is the largest layer and relatively homogeneous. It is made of more iron than the crust. Density, pressure, and temperature all increase the deeper you go in the mantle. Heat is transferred through convection. 68% of Earth’s mass QUESTION: Explain what you think is happening in the green layer above the mantle. QUESTION: Explain what you think is happening in the green layer above the mantle.

6 The core has two parts:  Inner  Outer The outer core is liquid and surrounds the solid inner core. The outer core is made of molten iron and nickel. The inner core is solid iron and nickel. The core has two parts:  Inner  Outer The outer core is liquid and surrounds the solid inner core. The outer core is made of molten iron and nickel. The inner core is solid iron and nickel. 31% of Earth’s mass QUESTION: Explain what this picture is demonstrating and how it relates to the core. QUESTION: Explain what this picture is demonstrating and how it relates to the core.

7 Structural Zones are often thought of their characteristic response to stress.

8 The lithosphere is made up of 2 parts: ◦ Crust ◦ Rigid ‘Upper Mantle’ It is divided into tectonic plates. The lithosphere is made up of 2 parts: ◦ Crust ◦ Rigid ‘Upper Mantle’ It is divided into tectonic plates. Rigid layer QUESTION: Do you think the tectonic plates consist of oceanic, or continental crust, or both. QUESTION: Do you think the tectonic plates consist of oceanic, or continental crust, or both.

9 Plastic layer The Asthenosphere is made up of:  Plastic ‘Upper Mantle’ Plasticity is when a solid rock flows very slowly due to heat and pressure. This is the layer on which tectonic plates move. The Asthenosphere is made up of:  Plastic ‘Upper Mantle’ Plasticity is when a solid rock flows very slowly due to heat and pressure. This is the layer on which tectonic plates move. QUESTION: How does the plasticity in the asthenosphere play a role in plate tectonics? QUESTION: How does the plasticity in the asthenosphere play a role in plate tectonics?

10

11 Strong layer The mesosphere is made up of:  ‘Lower Mantle’ Comparison to ‘Upper Mantle’  Greater density  More rigid  Same chemical composition The mesosphere is made up of:  ‘Lower Mantle’ Comparison to ‘Upper Mantle’  Greater density  More rigid  Same chemical composition QUESTION: As you increase depth in the mantle, what else happens? QUESTION: As you increase depth in the mantle, what else happens?


Download ppt "Earth has 2 types of layers or zones: - Compositional: what each layer is made of - Mechanical or Structural: physical characteristics about each layer,"

Similar presentations


Ads by Google