FALCON FOCUS ON YOUR OWN… Search for the 6 differences between the two pictures.
Falcon Focus.Answer the questions on the Falcon Focus sheet you picked up. • Label the layers of the Earth based on the picture • Describe how density changes as you move further • down into the Earth.
Falcon Focus: Label the following layers Essential Question: Why is the inner core of the Earth solid if it the hottest layer?
Falcon Focus: Label the following layers Essential Question: What challenges stand in the way of sending explorers to the center of the earth?
FALCON FOCUS State one (1) difference and one (1) similarity between the outer core and the inner core
How are the earth’s layers similar to an egg? Shell=crust Egg white=mantle Yolk=core Earth’s Layers
Structure of the Earth • The Earth is made up of 3 main layers: • Core • Mantle • Crust Mantle Outer core Inner core Crust
The Three Layers The Earth is composed of three different layers. The crust is the layer that you live on, and it is the most widely studied and understood. The mantle is much hotter and has the ability to flow. The core (outer core and inner core) are even hotter with pressures so great you would be squeezed into a ball smaller than a marble if you were able to go to the center of the Earth!
The Crust The Earth's Crust is like the skin of an apple. It is very thin in comparison to the other three layers. Outermost layer; thinnest under the ocean, thickest under continents; crust & top of mantle is called the lithosphere . The crust is composed of two rocks. The continental crust is mostly granite. The oceanic crust is basalt. Basalt is much denser than the granite. Because of this the less dense continents ride on the denser oceanic plates.
Crust • Position:Outermostlayer & Thinnest Layer Density:Least dense layer of all 2 types of crust: Oceanic: thinner, more dense, younger rock Continental: less dense, older rock
Crustcontinued… • Composition: • Solidrock • Made mostly of Silicon & Oxygen • Oceanic Crust = Contains Basalt Rock • Continental Crust = Contains Granite Rock
Lithosphere • Position:Lies between the crust and the upper Mantle • Features: Broken into pieces called TectonicPlates & Floats on top of the Asthenosphere.
Position: Top portion of the Mantle; known as the Upper Mantle • Features:Moves the tectonic plates and is a soft solid. Asthenosphere
Mantle • Position: Middle Layer • Features:ThickestLayer and contains the Convection Currents that helps move the tectonic plates • Density: Density increases with pressure the deeper you go into the Mantle • Composition: • Is a soft solid • Hot, softened rock • Contains Iron and • Magnesium
Convection Currents The mantle "flows" because of convection currents.Convection currents are caused by the very hot material at the deepest part of the mantle rising, then cooling and sinking again --repeating this cycle over and over.
Outer Core • Position:Outer part of the core • Density: Very dense, only less dense than Inner Core • Feature: Is the Only Liquid Layer and is responsible for • Magnetic Field that protects our Planet from Solar Wind. • Composition: • Slow-flowing liquid • Mostly Iron and Nickel
Inner Core Position: Deepest layer Density:Most denselayer Feature:Has enough pressure for it to remain as a solid. Composition: A spinning solid Mostly Iron and Nickel
If we can’t reach the Mantle, how do we know what it’s made of?? • Scientist track seismic waves (these come from Earthquakes) through the earth’s layers and they examine materials ejected from volcanic activity, which have helped scientists discover what the MANTLE is made of. • Most lava that comes from volcanoes is actually just melted crust and is not material from the mantle and/or the core.
So what about the Inner Core and Outer Core? Scientists know what the inner and outer core are made of (composition) based on the movement of seismic waves through the layers.
Why is the Inner Core solid?? • Even though it is really hot, the weight of all of the other materials above it (crust, mantle, and outer core) put a lot of pressure on the inner core, keeping it solid! • Why does the Earth have a Magnetic Field?? • The magnetic field is caused by the movement of the inner (spinning) and outer core (flowing liquid).
Falcon Focus • Name 3 differences between oceanic and continental crust. Essential Question: How do scientists know about the Earth's interior?
Falcon Focus • Essential Question: How does the Earth influence you and how do you influence the Earth?
Review 1) What are the six layers of the Earth? 2)Name the 2 types of crust. 3) Which layer is the thickest and contains the most mass? 4) Which layer is the only liquid layer? • Which layer is responsible for the magnetic field? • Which layer lies between the crust and the upper mantle? • What moves the soft rocks in the mantle? • The tectonic plates floats on top of which layer? • The tectonic plates are apart of which layer? • Name the 3 non-true solid layers.
Today you will create a cross-section poster of the interior of the Earth layers. Be sure to include AND LABEL all 6 layers. The Poster Must Also Include the Following: 1) Creative Title 2) Give 4 facts about each layer & 1 VERY INTERESTING FACT 3) Facts about the continental & oceanic crust as well 4) The Twist: YOU will need to find a way to represent YOUR FACTS BECAUSE YOU CAN NOT USE WORDS TO DESCRIBE THE EARTH LAYERS !!!!!!! 5) AT THE BOTTOM STATE WHICH LAYER DO YOU THINK IS THE MOST IMPORTANT LAYER AND WHY? PROVIDE EVIDENCE FOR YOUR REASONING OF WHY?
Agenda for Today Today you will create a diagram of the Earth’s layers and label each layer. Be sure to include all 6 layers. The Poster Must Also Include the Following: 1) Creative Title 2) Give 3-4 facts about each layer 3) Facts about the continental & oceanic crust as well
Exit Ticket 3-2-1 Reflection on your notes paper