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This example of mechanical weathering in my driveway shows how impact and collision (due to the constant movement of cars) and plant growth has begun to break the cement into smaller pieces. This example is considered mechanical weathering because the chemical nature of the cement has remained the same throughout this process. This process is old because it has taken some years to get to this point, but it is still progressing as it is still there and the elements acting on it have not changed.

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This example of chemical weathering is from a dish in my backyard. Due to years of exposure to the elements, the dish has rusted. Rusting is the process when iron reacts with oxygen and water in the air, forming iron oxide. This is classified as chemical weathering because the chemical composition of the object in question has changed. Also, because of the fact that the dish is still out there, this process is  progressive.

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This example of mass wasting in the Sunset Heights area shows how rainfall, wind, and the force of gravity have eroded the rocky soil into this slope. The mass wasting I believe is involved here is a creep, as the process going on here is extremely slow. However with time, the hillside will continue to erode the ground and the slope will grow closer to the fence line, eventually uprooting the fence. Because of how long this process takes, it has been going on for quite a while now making it old, but as it is still going on the process is also progressive.