Look at the top of your web browser. Plate movement causes earthquakes when they scrape past each other (use hands to demonstrate movement of plates). Ask students how they think scientists are able to predict what the inside of our Earth looks like. What is meant by the core of the Earth, and how is it classified? Interior Structure of the Earth. So, if we can't dig that far, how do we know what makes up the interior of the earth? Seismic waves are recorded by a machine called a seismograph, which tells us about the strength and speed of the seismic waves. Description: Using an egg to represent our planet Earth, this demonstration can give students a clearer understanding of the ratio and proportion of the Earth's crust, mantle, and core. Another significant change in wave speed occurs at the edge of the inner core. On the top and bottom parts of the mantle, the rock doesn't move very much. One of the ways the United States was able to monitor nuclear testing by the Soviet Union was to study seismic waves that radiated underground from the nuclear tests. Drilling Into the Earth Worksheet. Interior of the earth ppt. Around 100 to 250 kilometers P and S waves arrive later than expected and the S waves are weakened. The mantle is almost entirely solid rock, but it is in constant motion, flowing very slowly.
We know that the surface of the earth is solid because we can easily see this. Ask students to write a 1-page paper to address the following questions: Assessment: Observe students during the egg activity. Closure: After students have completed the worksheets, review the answers. This means seismic waves travel quicker through solid than liquid. Important Interior of Earth Questions with Answers. Interior of Earth Questions - Practice Questions with Answers & Explanations. Seismograms, which are recordings produced by seismographs, are the main way that scientists know what Earth's interior is made of.
Directions: Have two students distribute eggs, plates, napkins, and plastic knives. And in fact, this is the place where the mantle and the outer core meet. Geology is a field of study concerned with the structure and dynamics of Earth and can be broken down into several branches of study including geology, geochemistry, petrology, mineralogy, paleontology, and environmental geology. The crust is 25 miles deep. Branch of Geology||Methods of Study|. The outer core is composed of liquid iron and nickel and creates Earth's magnetic field. Interior of the earth worksheet. How is the interior of Earth classified? The field of geology can be broken down into several branches all studying specific features or areas of Earth. This designates the asthenosphere or partially molten areas of the mantle. The outer core is very hot.
Garbage bag (for clean-up). The mantle occupies _____ of the Earth. Present the following information on an overhead: - The Earth's crust is approximately 25 miles thick, contains solid rock (which is mostly granite), but also contains igneous, sedimentary, and metamorphic rock. DIAGRAM OF INTERIOR OF THE EARTH worksheet. Over time, the earth began to cool, and more solid layers formed, creating the earth's crust. The core accounts for almost half of Earth's radius, but it amounts to only 16. This layer is not as thick as the other inner layers of the earth. Surface waves are important, but they don't provide much information about what happens below the surface.
Build this layered ball of clay and cut it in half to see a cross-section of the layers at the end. According to scientists, these plates have been moving throughout Earth's history, and they are still moving today at a rate of 3 inches per year. The earth's hydrosphere contains the water on the earth. Geologists use two types of evidence to learn about Earth's interior. Submitted by: Laurie Molnar. Interior part of the earth worksheet. Sixth Grade Plate Tectonics Homepage.
S stands for secondary waves because these are slower than P waves, arriving second on the seismogram. Using a compass to help you draw different sizes of circles, draw a very thin crust, the upper mantle, the lower mantle, a thick outer core, and a smaller inner core. Lesson Plan #: AELP-EAR0203. The lithosphere can't be classified neatly as either crust or mantle because it consists of both. Explain that we can find valuable resources in the crust (oil and minerals). Lesson Focus: Explain that Earth's interior has three main layers: (Write the terms on board: crust, mantle, and core. ) Outer Core||5180 to 2990 kilometers below Earth's surface||Liquid iron and nickel heated by radioactive decay of uranium and thorium; churning of liquid iron and nickel creates electrical currents that generate Earth's magnetic field. Collect students' worksheets to review students' understanding of the interior sections of the Earth. Without a weak asthenosphere, plates would be locked in place, unable to move as they do now. It's pretty easy…draw three circles, a large one, a smaller one inside the large one, and yet, another inside that one. In those early days over 4 billion years ago, the earth was mostly made up of liquid rock in volcanoes and was pounded by collisions from other things in space. Topics addressed: How scientists analyze Earth's interior, Names of layers of Earth's interior, Earth's crust, Asthenosphere, Mantle, Outer core, Inner core, Depth of the layers, Phase of matter of the layers, Temperature changes of Earth's interior, Pressure changes of Earth's interior, Density changes of Earth's interior, Comparing continental and oceanic cru. Beneath the lithosphere is the amounts of melted rock dispersed through the otherwise solid asthenosphere make the asthenosphere weak compared to the lithosphere. Describe the interior of the earth. JavaScript isn't enabled in your browser, so this file can't be opened.
Ask students, based on what was reviewed, what part of Earth they believe the shell of the egg represents. In the middle of the mantle is the asthenosphere. P stands for primary waves because these waves travel the fastest and are detected first. The mantle is very thick: 1800 miles deep. See for yourself why 30 million people use. The D" (dee double prime) layer is a mysterious layer beginning approximately 200 km above the boundary between the core and mantle. P waves can travel through both liquid and solid material, but S waves can only travel through solids. None of the options. We know that the mantle is solid because both P and S waves travel through it. For each layer, add on the depth of that layer to the circle that you've already made, then cut out that new, larger circle. In which state is the core of the Earth?
The inner core of the earth is the center of the earth. Please upgrade to a. supported browser. Mineralogy||Studies minerals in Earth's crust as well as lunar and meteorite samples|. The core is extremely hot (~3500° to more than 6000°C). Answer: c) Lithosphere. The mantle is made of mostly that 'liquid' rock that moves like silly putty, but the outer core is an area of mostly liquid iron, which is much denser than the rock in the mantle. Layer of Earth||Depth||Characteristics|. This worksheet has 27 Earth Science Regents questions about Earth's interior.
Why is the core also known as the "nife" layer? Mantle has a density ______ the crust portion.
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