Weathering gizmo Exam With Accurate Answers.

What type of weathering is illustrated by the cracks in the simulated granite outcrop below? - correct answer C. Pressure release. Explanation: Granite forms from the cooling of molten magma deep below Earth's surface. As granite is uplifted, layers of rock above are eroded away, which reduces the pressure on the granite. The release of pressure causes the outer layers of rock to expand and form cracks called "exfoliation joints" parallel to the surface. The rock below is in Whistler, Canada. What type of weathering is illustrated here? - correct answer B. Abrasion. Explanation: The image shows long scratches in the surface of a rock. These scratches were caused by abrasion. As a glacier moved over the landscape many years ago, rocks trapped in the bottom of the glacier scratched the bedrock below. Which types of mechanical weathering are most likely represented below? - correct answer D. A) Frost wedging, B) root wedging, C) salt weathering, D) heat expansion Explanation: Image A shows a rock cleanly split in half, which is characteristic of frost wedging. Image B shows tree roots intertwined in layers of rocks, forcing them apart. Image C shows a honeycomb texture that is typical of salt weathering. Image D shows a rock that is shedding its outer layers, most likely due to heat expansion. Based on the weathering patterns you see, what rock type is most likely shown below? - correct answer C. Limestone Explanation: The image shows the entrance to a cave. Caves are characteristic of limestone landscapes. Rainwater containing dissolved carbon dioxide is slightly acidic and slowly dissolves limestone rock away, forming caves and related features such as underground rivers and sinkholes. Which climate conditions will cause the fastest chemical weathering of granite, sandstone, and shale? - correct answer B. Warm and wet. Explanation: The chemical reactions that break down granite, sandstone, and shale all occur most quickly when the temperature is warm. Because these reactions require water, chemical weathering is fastest in wet climates.