Question

1. caves primarily form in rocks made of limestone. why is limestone a particularly good cave - forming rock? it is made of the mineral calcite, which easily breaks down in the presence of water it breaks apart very easily by frost wedging. it is not dissolved by water it is made of the mineral silica, which easily breaks down in the presence of water

Explanation:

Limestone is composed mainly of calcite. When water containing carbon - dioxide (a common situation in nature) comes into contact with limestone, a chemical reaction occurs and the calcite in limestone dissolves. This dissolution process is crucial for cave - formation. Frost wedging is more related to physical weathering in cold environments and not the main reason for limestone's suitability for cave - formation. Limestone is dissolved by water, not resistant to it, and it is not made of silica.

Answer:

It is made of the mineral calcite, which easily breaks down in the presence of water.