6. Which of the following occur on rocks as a result of the action of certain elements and compounds in the environment, such as oxygen, carbon dioxide, and water? A. Chemical weathering C. Decomposition B. Mechanical Weathering D. Disintegration 7. This type of mechanical weathering occurs when rock fragments are being carried along by agents of erosion, such as water in streams or rivers. A. abrasion B. exfoliation C. temperature changes D.rain 8. Which of the following is NOT true about Mechanical Weathering? A. May occur due to change in temperature, human activities, and the actions of plants, animals, and frost. B. The physical and chemical characteristics of rocks are changed C. It occurs when water enters cracks causing the rocks to break. D. None of the above​