art 0 underlying mantle. Scientists have already estimated the composition of th
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art 0 underlying mantle. Scientists have already estimated the composition of the mantle based on rock samples that have reached Earth's surface. The tables below show the estimated composition of the mantle and the crust. Use the data to complete the skills sheet. In 'Mission to the Mantle (p. 12), you learned about a project that aims to drillthrough ELEMENTS IN EARTH'S MANTLE ELEMENTS IN EARTH'S CRUST ElementAbundance by Weight Abundance by Weight 46% 2896 Element 4596 2396 21% Silicon Slicon Iron Calcium Sodium 69% 49% 39% 296 2% 1% Other Other 3% Ansuar #1-y only Bouse CRC Handbook of Chemay and Physcs 77 En Mont hou to do On a separate sheet of paper, use the data to create a circle graph showing the composition of crust and another circle graph showing the composition of the mantle. Tips to creating a circle graph 1. Convert the percentages into angle degrees Example: 3. Use a protractor to draw wedges inside the circle using the , 45% of the mantle is made of oxygen, the pe wedge for 'oxygen" would be 45% of the 360 degree circle, or 1 62 degrees (360 x.45 162) angles you calculated in Step 1. Measure each edge from the edge of the one before. When finished, the entire circle should be filled and the wedges should add up to 360° 4. Be sure to give your chart a title and label each section, ncluding the percentage 2. Draw a circle. Mark the middie point and draw a straight line from the middle to the outside of the circle. ANALYZE IT 1. What percentage of Earth's crust is made up of silicon? (4 two major differences between the compositions the mantle and the crust at percentage of the Earth's mantle is made up of silicon oxygen combinec 5. The periodic table contains 91 naturally occurring elements. Only 6 of these elements make up the majority of the mantle What percent of naturally occurring elements on the periodic table do these 6 elements represent? 3.)Which elementís) is present in the same abundance in the erust and the mantle? MARCH 21. nroduce tor classroom use onty. 82016 by Scholastic IncExplanation / Answer
1. It is made up of twenty eight percent of silicon
2. 66 percent of the mantle is made with silicon and oxygen
3.Iron has the same abundance in both mantle and the crust with a percentage of 6.
4. In crust the magnesium percentage is very less that is 2 percent but it is abundant in mantle which is 23 percent. Sodium is available on the crust but not in the mantle.
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