Ess 101 midterm 2 2025

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The document is a midterm exam for ESS 101 from Winter 2012, consisting of multiple-choice questions covering topics in geology, including igneous rocks, tectonic settings, mineral properties, and seismic wave behavior. It includes 41 regular questions and 4 bonus questions, focusing on concepts such as magma composition, volcanic activity, mineral classification, and Earth's internal structure.

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What is the most important rock in concrete production?

Cement is a finely milled mineral powder, usually grey in colour. The most important raw materials for the production of cement are limestone, clay, and marl. Mixed with water, cement serves as an adhesive to bind sand, gravel, and hard rock in concrete.

What is the most important rock forming mineral?

Predominantly silicate minerals, encompassing the likes of quartz, feldspars, micas, and various others, these minerals intricately shape the composition, texture, and characteristics of rocks.

What is the most important mineral in cement?

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What was the pH of the highest acidic rain that fell in the US in 2000?

Pure water has a pH of 7 and normal rainwater has a pH around 5.6. In 2000, the most acidic rain that fell in the United States had a pH of 4.3.

What is the most important ingredient in concrete?

Portland cement is the basic ingredient of concrete. Concrete is formed when portland cement creates a paste with water that binds with sand and rock to harden.