EOSC210 MIDTERM EXAM ACTUAL 2025/2026 WITH VERIFIED ANSWERS

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EOSC210 MIDTERM EXAM ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS What are the main layers of the Earth? - Answer -"Crust, Mantle, Outer Core, Inner Core." Which layer of the Earth is liquid? - Answer -The Outer Core. What elements mainly make up the Earth's core? - Answer -Iron and nickel. What is the difference between the lithosphere and the asthenosphere? - Answer -The lithosphere (crust + uppermost mantle) is rigid; the asthenosphere below is plastic and flows slowly. Who proposed the hypothesis of continental drift? - Answer -Alfred Wegener. Why was Wegener's theory originally rejected? - Answer -"He was not a geologist, had weak evidence for a driving mechanism, and his explanation (Earth's rotation) was incorrect." What new evidence later supported Wegener's hypothesis? - Answer -"Mapping of the sea floor, magnetic striping, fossil records, and matching mountain ranges across continents." Name the three main types of plate boundaries. - Answer -"Divergent, Convergent, and Transform (plus Passive Margins as non-active)." What geological feature forms at a divergent boundary? - Answer -Rift valleys or mid-ocean ridges. Need assistance on Online classes, Exams & Assignments? Reach out for instant help!! Full Course Assistance, Plagiarism-free Essay Writing, Research Paper, Dissertation, Discussion Posts, etc…. Confidential & Secure services. Tutors are available for all subjects! Email now at: tutorjean01@gmail.com What happens at convergent boundaries? - Answer -Plates collide; subduction may occur if one plate is denser. Do transform boundaries create volcanoes? - Answer -"No, transform boundaries have earthquakes but no volcanoes." Where does the youngest oceanic crust form? - Answer -Adjacent to mid-ocean ridges. What are the three main driving forces behind plate tectonics? - Answer -"Mantle convection, slab pull, and ridge push." What causes slab pull? - Answer -Denser subducting plates sink due to gravity as mineral changes increase their density. What causes ridge push? - Answer -"Elevated mid-ocean ridges create gravitational sliding as hot, less dense rock pushes plates apart." Why is plate tectonics important for engineering? - Answer -"The type of plate margin influences seismic, volcanic, and structural risks for projects." What is the scientific definition of a mineral? - Answer -"A naturally occurring, inorganic solid with an orderly internal structure and a characteristic chemical composition, crystal form, and physical properties." List the five key characteristics of a mineral. - Answer -"Naturally occurring, inorganic, solid, crystalline structure, and defined chemical composition." "Which of the following is a mineral: wood, mercury, granite, steel, or ice?" - Answer -Ice. Why is obsidian not considered a mineral? Need assistance on Online classes, Exams & Assignments? Reach out for instant help!! Full Course Assistance, Plagiarism-free Essay Writing, Research Paper, Dissertation, Discussion Posts, etc…. Confidential & Secure services. Tutors are available for all subjects! Email now at: tutorjean01@gmail.com