3. Scientists have found evidence that the outer part of the planet is divided i

Question

3. Scientists have found evidence that the outer part of the planet is divided into large interacting pieces called lithosphere plates. Which layers of the planet compose the lithosphere? Write your letter choice in the blank space provided. (1 point) a. crust and aesthenosphere c. crust and Moho. b. crust and solid uppermost mantle d. continental crust and oceanic crust 4. Igneous rocks are rocks that solidify from magma as it cools. Granite is the common igneous rock of continents. What does the crystal size of the minerals within granite indicate about the circumstances under which granite cooled? (1 point) Write your letter choice in the blank space provided. a. Tiny microscopic crystals indicate that granite cooled quickly at the surface. b. Large crystals indicate that granite cooled quickly at the surface c. Tiny, microscopic crystals indicate that granite cooled slowly below the surface.. d. Large crystals indicate that granite cooled slowly beneath the surface 5. Limestone is a type of sedimentary rock that readily dissolves in weak acid. How does limestone typically form and what is its chemical composition? (2 points) 6. Answer only ONE of the following two question choices: (6 points) a. Fossil fuels are a classified as organic sedimentary rocks (even though particular fossil fuels may be in the form of a liquid or gas). Coal is one of the most widely used fossil fuels because it is abundant and provides a lot of heat energy when burned. How did coal form and what specific major impacts does mining and burning coal have on the natural environment? b. A recently developed technique for obtaining petroleum and natural gas from the ground is rapidly spreading to locations where previously it was not economical to extract these fossil fuels. This new method is popularly called “fracking.” Briefly explain process of fracking. In your answer include why this process has become so controversial in dry climate states of the western region of the U.S. 7. Metamorphic rock is any type of rock that has physically or chemically altered under conditions of high pressure, high temperature and /or subjected to infusion of dissolved minerals. From what sedimentary rock is marble derived? (1 point) a. shale b. sandstone c. granite d. limestone 8. Briefly explain the rock cycle and how it works (as indicated in the presentation about metamorphic rocks and the video assignment). (2 points) 9. Mineral resources are vital to urban technological societies. What important general factors determine whether a mineral deposit should be mined? (2 points) 10. Alfred Wegener provided convincing evidence that all of the continents were once joined together into a single land mass (which he called Pangaea), but he was not able to provide a plausible explanation for how continents move. Later, Harry Hess and Robert Dietz proposed that instead of continents plowing though the sea floor, new sea floor forms at mid-ocean ridges. Briefly discuss two lines of evidence verifying that sea floor spreading takes place at the mid-ocean ridge on the Atlantic Ocean sea floor. The answer is not just a two-item list, but also a brief explanation of how this evidence indicates that the sea floor is spreading. (Note: this question is not about whether continents were once joined together; it is about the evidence that sea floor is spreading at mid-ocean ridges. The question is also not about the role of ocean trenches. No introductory sentence is needed. (4 points)

Explanation / Answer

Answer : 3) crust and upper part of mantle

Crust and upper part of mantle together constitutes the lithosphere. And this lithosphere is divided into number of plates.

4)

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