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6. Which of the following tends to cause physical and mechanical weathering? A. animals that burrow in the ground B. roots of plants growing into cracks in the rocks C. water that seeps into the pores and cracks of rocks D. all of the above 7. Why is the soil in riverbanks with trees growing near them not easily eroded by water? A. The roots absorb the water. B. The roots hold the soil particles together. C. The soil is compact and hard to break. D. The soil stops the water from seeping into it. 8. Which of the following occurs when acidic water caused the rocks to break producing clay and soluble salts? A. carbonation B. oxidation C. hydrolysis D. erosion 9. When soil moves from one place to another, what process takes place? A. deposition C. chemical weathering B. erosion D. physical weathering 10. Which of the following human activities is not a caused of physical weathering? A. quarrying or rocks C. building roads and tunnels B. mining ores D. boating and fishing 11. Which of the following is an example of mechanical and physical weathering? A. the action of acids in rocks B. the growth of lichens in rocks C. the combination of oxygen with iron and other minerals in rocks D. the contraction and expansion of rocks due to temperature changes 12. Which of the following factors affect the rate at which weathering occurs? A. moisture C. temperature B. size of the rock D. all of the options given
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