"Crater" Natural Recordings by Native Speakers
A crater is a depression in the surface of the earth or moon caused by a meteorite, asteroid, or comet impact, or by volcanic activity. It is usually surrounded by raised edges, called a rim, and often has a flat bottom.
Crassulacea is a botanical order of flowering plants, commonly known as stonecrop or orpine. It is a group of succulents that are characterized by their thick, fleshy leaves, which enable them to store water and thrive in dry environments. Members of the Crassulacea family include popular garden ornamental plants such as aloe, echeveria, sedum, and crassula.