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STRUCTURE OF THE EARTH ACTIVITY In this activity you are going to build a model of the interior of the Earth and its surface. You will only be given one file folder and if you fail to follow the directions, you will not be given another one (although you may provide your own). You will have approximately two class periods to work on your project. You will have to do some work at home, such as computer research of facts that you are going to use. Your completed model is due on: . MATERIALS: One manila folder Rubric Checklist Ruler Compass Assorted colored pencils, markers etc. Pre-read ALL of the directions before you begin. PROCEDURE: 1. Using your metric ruler, cut out two (2) squares from the file folder that measure 20cm on each side. 2. Draw two, very light diagonal lines across opposite corners of both squares so that you form a very light “X”. The spot where the lines intersect is the center of the square. Erase the pencil marks but not the center mark. 3. Using your compass, draw a circle that has a radius of 9.5 cm on both sides of both squares. Practice using the compass on scrap paper before drawing any circle on any of the sides. 4. From the middle of one side, draw a very faint pencil line from the edge of each square to the mid-point of each circle. Use your scissors to cut a slit to the center point of each square. 5. Slip one square into the other square and you should have the structure that is on the front table. The circles on all four sides should match exactly as they do on the supply table. From this point forward, do not separate the squares. 1 6. Label each square in upper left hand corner with the letters “A”, “B”, “C”, and “D” as shown on the structure on the front table. Write your name and period number in the lower left hand corner of side A. 7a. On side A, use your compass to draw the layers of the Earth based on their chemical composition as shown on page 191 of your textbook. 7b. Label and color these layers. The following must be labeled on this side: crust (grey) mantle (red) core (yellow) thickness of each layer in kilometers (km) percent (%) of earth’s mass major elements present in each layer 8a. On side C, use your compass to draw the structure of the Earth based on physical characteristics as seen pages 192 and 193 of your textbook. 8b. Label and color these layers. The following must be found in this drawing: lithosphere (grey) asthenosphere (red) mesosphere (orange) outer core (yellow) inner core (red- yellow) thickness of each layer in kilometers (km) description of the characteristics of each layer 9. Do not use colors that are too dark, too light or too streaky. Be neat. 10. Cut out the Western Hemisphere map and carefully glue or back tape it to side B. Color the landmasses and oceans an appropriate color. Use the map to label the continents and oceans. 11. Cut out the Eastern Hemisphere map and carefully glue or back tape it to side D. Color the landmasses and oceans an appropriate color. Use the map to label the continents and oceans. 12. Use the Earth Structure checklist to complete sides B & D. Note: Your model will be used as a tool as you investigate the structure of the earth. You may include additional information to help you better understand this topic. 2