How are caves made? Objective The students will be able to: Classify the elements in creating a cave Make decisions using cave vocabulary Background The basic elements needed to make Mammoth Cave include rocks, water, and time. The two most common rocks are limestone and sandstone. Limestone is the “soft” rock (more water soluble) that is dissolved more easily by water. It is gray in color and has a smooth texture. This rock is the older of the two rocks and is made from shells and bones of animals that once lived in an ancient sea. The cave is found in the dissolved limestone rock. Sandstone Duration: 30 Minutes Essential Question How are caves made? Objective The students will be able to: Classify the elements in creating a cave Make decisions using cave vocabulary Background The basic elements needed to make Mammoth Cave include rocks, water, and time. The two most common rocks are limestone an.