Context: At the start of a classic valley glacier is a bowl-shaped cirque, which has escarped walls on three sides but is open on the side that descends into the valley. Cirques are where ice begins to accumulate in a glacier. Two glacial cirques may form back to back and erode their backwalls until only a narrow ridge, called an arête is left. This structure may result in a mountain pass. If multiple cirques encircle a single mountain, they create pointed pyramidal peaks; particularly steep examples are called horns.

Question: On which side is a cirque opened?
Answer: the side that descends into the valley

Question: Where does ice start accululating in a glacier?
Answer: Cirques

Question: What is a narrow ridge formed by two cirques eroding back to back called?
Answer: arête

Question: What are extremely steep cirques called?
Answer: horns

Question: How many sides are closed in a typical cirque?
Answer: three sides

Question: What is on the side that ascends out of a valley?
Answer: Unanswerable

Question: What do cirques gorm in mountains?
Answer: Unanswerable

Question: What are shallow cirques called?
Answer: Unanswerable