Identify an object in your life that experiences weathering. (1 point)
Describe how your object has changed over time due to weathering. (1 point)
Identify whether physical or chemical weathering has occurred and what specific type of physical or chemical weathering caused these changes. (2 points)
An object in my life that experiences weathering is a stone garden statue.
Over time, the stone garden statue has changed due to weathering. Initially, the statue had sharp, defined features and a smooth surface. However, as weathering has occurred, the statue has lost its sharpness and the surface has become rough and pitted. Additionally, there are noticeable cracks and chips in some areas.
In the case of the stone garden statue, both physical and chemical weathering have occurred. Physical weathering can be observed through the cracks and chips, which are a result of mechanical forces like freeze-thaw cycles and abrasion. Chemical weathering is evident through the rough and pitted surface, indicating the process of dissolution or reactive chemical reactions acting on the stone.
An object in my life that experiences weathering is a stone sculpture that I have in my garden.
Over time, this stone sculpture has changed in several ways due to weathering. Firstly, its overall shape and contours have become slightly smoother and rounded. This is due to the constant exposure to wind, rain, and temperature fluctuations, which have slowly eroded away the sharp edges and features of the sculpture. Additionally, the surface of the stone has developed small cracks and fissures, as well as patches of discoloration, caused by the penetration of water, freeze-thaw cycles, and chemical reactions with substances present in the air.
In terms of weathering type, both physical and chemical weathering have occurred on this stone sculpture. Physical weathering, specifically freeze-thaw weathering, is responsible for the cracks and fissures that have formed. This occurs when water seeps into the pores of the stone, freezes, and expands, causing the rock to fracture. Chemical weathering, on the other hand, has resulted in the discoloration and decomposition of the stone's surface. Acid rain and atmospheric pollutants have reacted with the minerals present in the stone, causing them to break down and change color.
To identify an object in your life that experiences weathering, think about objects that are exposed to the elements and have undergone noticeable changes over time. One such object could be a statue in your backyard.
To describe how the statue has changed over time due to weathering, you can observe that its surface has become rough, and certain details like fine lines and features have become less defined. Additionally, the color of the statue may have faded, making it appear duller.
Now, let's identify whether physical or chemical weathering has occurred and what specific type of weathering caused these changes. Physical weathering involves the breakdown of rocks and minerals without a change in their chemical composition. One type of physical weathering that could have affected the statue is freeze-thaw weathering. This occurs when water seeps into cracks or pores in the statue, freezes during cold weather, and expands, exerting force and causing the rock to break apart.
On the other hand, chemical weathering involves the alteration of rocks and minerals through chemical reactions. One possible type of chemical weathering that could have contributed to the changes in the statue is oxidation. If the statue is made of a metal like iron, prolonged exposure to oxygen and moisture in the air can lead to the formation of rust, causing the surface to deteriorate and change in color.
In conclusion, the statue in your backyard is an object that experiences weathering. It has changed over time due to both physical and chemical weathering. Physical weathering, specifically freeze-thaw weathering, has caused cracks and roughness on the surface. Chemical weathering, particularly oxidation, has resulted in the formation of rust and the fading of color.