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Explore it! Look at the model provided for you and answer the questions about the layers of the Earth on your lab sheet. Layer 1 is called the Earth’s crust. It is the thinnest layer and made up of mostly granite and basalt. If you think about the outer layer of an apple, the Earth’s crust would be compared to that. 1. Do you think this the densest layer or least dense layer? Why? Layer 2 is called the Earth’s mantle. It is the thickest layer and made up of mostly magma, which is lava within the Earth. There are convection currents in the mantle that cause the tectonic plates o move as the heat flows. 2. Why do you think we know very little about the mantle? Layer 3 is called the Earth’s outer core. It is made up of mostly liquid Iron and Nickel. Layer 4 is called the Earth’s inner core. It is made up of mostly solid Iron and Nickel. Scientists believe the magnetic properties of the Earth are caused by this layer of the Earth. It is the Earth’s densest layer. Even though it’s as hot as the surface of the Sun, it is solid. 3. Why do you think the outer core is liquid and the inner core is solid? 4. How do you think scientists are able to study the center of the Earth? Illustrate it! Sketch the diagram on your page and label each of the layers. Write it! Why does the Earth have different layers? List the layers of the Earth and provide a short description of each layer starting with the center of the Earth. How is density related to the layers of the Earth? Organize it! Match the Earth’s layers with the correct descriptions. Have the teacher check your cards to ensure it is correct.They will sign Teacher initials: your lab sheet in the Organize It box to the right. _______________ Watch it! Click Play on the video https://drive.google.com/file/d/0BxOms4hIDv R3N1hDbWZZV3kyWE0/view How far have humans been able to drill into the Earth? What scientific principle causes the different layers of the Earth? Which two elements are found in the inner core? Solid or liquid? Read it! How do scientists know how hot the core is? A. Thermometers B. Seismic waves C. Oil wells D. Measure the electromagnetic spectrum What would be the best title for this passage? A. How Scientists Explore the Inside of Earth B. Details about Each of the Earth’s Layers C. Tectonic Plate Mania D. The Rock Cycle The Earth’s core is about the size of ________________. A. Saturn B. Pluto C. The United States D. New York City The deepest wells and holes can make it to which layer? A. Crust B. Mantle C. Inner Core D. Outer Core Assess it! Put the layers of the Earth in order from densest to least dense. A. Crust, Mantle, Inner core,Outer core B. Inner core,Mantle, Outer core,Crust C. Crust, Mantle, Outer core,Inner core D. Inner core,Outer core,Mantle, Crust Which two elements are mainly found in the inner and outer core? A. Fe and Ni Which layer plays the greatest role in the movement of tectonic plates? A. Crust B. Mantle C. Outer Core D. Inner Core Why is the inner core solid? A. Even though it is as hot as the surface of the Sun, it has immense pressure upon it. B. Fe and Si C. Ni and Si D. Ni and C B. Iron and Nickel are only solid C. Because Nickel is not dense D. Because it is made up of mostly granite and basalt Research it! 1. Go to http://goo.gl/92fH4m 2. Click through each of the layers and listen to the information about each layer. 3. Answer the questions in the following boxes. 1. Which layer of the Earth contains convection currents? 2. Compare the density of the outer core to the density of the crust, mantle and inner core. 1. What is the average thickness of the Earth’s crust? 2. What causes the lithosphere to move? 1. 1. 2. 2. Total: __________________