Which of the following weathering processes results in the reddish orange coating metal (rust) ? Select one: A. differential weathering B. freeze thaw C. root wedging D. oxidation Which of the following features is formed by the collapse of caves? Select one: A. stalagmite B. travertine C. flowstone D. sinkhole E. stalactite The largest area of karst in the United States is included in: Select one: A. North Dakota B. North Carolina C. Florida D. Texas

1) D. oxidation processes results in the reddish orange coating metal (rust).

2) D. sinkhole is formed by the collapse of caves.

3) The largest area of karst in the United States is included in C. Florida

Explanation:

1) Oxidation -

Oxidation is the process that causes the metal to rust, in presence of moist air. This weathering process is also useful in the cave formation

2) Sinkhole -

Sinkhole is a hole in the ground which is formed when both rocks and soil are removed by flowing water.

3) Florida -

Florida includes the largest area of karst in the United States.