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Answers for question 4-7 please.

Answers for question 4-7 please.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Answers for question 4-7 please. 

**Part 3: Age of the Seafloor** The map below shows the ages of seafloor basalt (the age of the igneous rock that actually makes up the crust—which is below the seafloor sediment that has accumulated on top of it over time) between North America and Africa. ![Seafloor Age Map](your-image-link) ### Instructions: 1) **Identify Divergent Plate Boundary**: Draw a red line on the map to show the exact location of the divergent plate boundary between the North American Plate and the African and Eurasian Plates. Refer to lecture slides if you need a reminder on which plate is which. 2) **Identify Transform Fault Plate Boundaries**: Draw two blue lines on the map to show the location of two transform fault plate boundaries. 3) **Observe Seafloor Spreading**: Notice that points B and C were together 145 million years ago. Did the sea floor spread apart at exactly the same rate on both sides of the mid-ocean ridge? How can you tell? 4) **Distance Calculation**: How far apart are points B and C today in kilometers? 5) **Average Rate Calculation**: Calculate the average rate in kilometers per million years that points B and C have moved apart over the past 145 million years (be sure to show your work!). 6) **Conversion of Rate**: Convert your answer above from kilometers per million years to millimeters per year. ### Diagram Explanation: - **Color Shading**: The map uses color shading to represent different ages of the seafloor basalt. The color gradient moves from darker shades for older regions to lighter shades for younger regions. - **Labeling**: The map includes labels for geographical areas such as North America, South America, and Africa, as well as specific points labeled A, B, C, D, and E for reference in the activities. - **Scale**: A scale bar in kilometers is included to assist in distance measurements. Use this information to complete the tasks and enhance your understanding of seafloor spreading and plate tectonics.
Transcribed Image Text:**Part 3: Age of the Seafloor** The map below shows the ages of seafloor basalt (the age of the igneous rock that actually makes up the crust—which is below the seafloor sediment that has accumulated on top of it over time) between North America and Africa. ![Seafloor Age Map](your-image-link) ### Instructions: 1) **Identify Divergent Plate Boundary**: Draw a red line on the map to show the exact location of the divergent plate boundary between the North American Plate and the African and Eurasian Plates. Refer to lecture slides if you need a reminder on which plate is which. 2) **Identify Transform Fault Plate Boundaries**: Draw two blue lines on the map to show the location of two transform fault plate boundaries. 3) **Observe Seafloor Spreading**: Notice that points B and C were together 145 million years ago. Did the sea floor spread apart at exactly the same rate on both sides of the mid-ocean ridge? How can you tell? 4) **Distance Calculation**: How far apart are points B and C today in kilometers? 5) **Average Rate Calculation**: Calculate the average rate in kilometers per million years that points B and C have moved apart over the past 145 million years (be sure to show your work!). 6) **Conversion of Rate**: Convert your answer above from kilometers per million years to millimeters per year. ### Diagram Explanation: - **Color Shading**: The map uses color shading to represent different ages of the seafloor basalt. The color gradient moves from darker shades for older regions to lighter shades for younger regions. - **Labeling**: The map includes labels for geographical areas such as North America, South America, and Africa, as well as specific points labeled A, B, C, D, and E for reference in the activities. - **Scale**: A scale bar in kilometers is included to assist in distance measurements. Use this information to complete the tasks and enhance your understanding of seafloor spreading and plate tectonics.
### Plate Tectonics Exercise 1) **Identify the Divergent Plate Boundary:** - Draw a red line on the map to identify the divergent plate boundary between the North American Plate and the African and Eurasian Plates. Refer to lecture slides if you need a reminder on which plate is which. 2) **Transform Fault Plate Boundaries:** - Draw two blue lines on the map to show the location of two transform fault plate boundaries. 3) **Sea Floor Spreading:** - Notice that points B and C were together 145 million years ago, but did the sea floor spread apart at exactly the same rate on both sides of the mid-ocean ridge? How can you tell? 4) **Current Distance Between Points:** - How far apart are points B and C today in kilometers? 5) **Average Rate Calculation:** - Calculate the average rate in kilometers per million years that points B and C have moved apart over the past 145 million years (be sure to show your work!) 6) **Conversion to Millimeters per Year:** - Convert your answer above from kilometers per million years to millimeters per year. 7) **Movement over a Human Lifetime:** - A 20-year-old college student wants to know how far Africa and North America have moved apart during their lifetime. Based on your answers above, make the calculation for how far Africa and North America moved apart during the last 20 years (or feel free to do the calculation for your actual age).
Transcribed Image Text:### Plate Tectonics Exercise 1) **Identify the Divergent Plate Boundary:** - Draw a red line on the map to identify the divergent plate boundary between the North American Plate and the African and Eurasian Plates. Refer to lecture slides if you need a reminder on which plate is which. 2) **Transform Fault Plate Boundaries:** - Draw two blue lines on the map to show the location of two transform fault plate boundaries. 3) **Sea Floor Spreading:** - Notice that points B and C were together 145 million years ago, but did the sea floor spread apart at exactly the same rate on both sides of the mid-ocean ridge? How can you tell? 4) **Current Distance Between Points:** - How far apart are points B and C today in kilometers? 5) **Average Rate Calculation:** - Calculate the average rate in kilometers per million years that points B and C have moved apart over the past 145 million years (be sure to show your work!) 6) **Conversion to Millimeters per Year:** - Convert your answer above from kilometers per million years to millimeters per year. 7) **Movement over a Human Lifetime:** - A 20-year-old college student wants to know how far Africa and North America have moved apart during their lifetime. Based on your answers above, make the calculation for how far Africa and North America moved apart during the last 20 years (or feel free to do the calculation for your actual age).
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