mid-ocean ridgea long underwater mountain range formed by volcanic activity along diverging platesThe Mid-Atlantic Ridge is the longest mid-ocean ridge, stretching over 16,000 kilometres.NoteThe Mid-Atlantic Ridge is the longest mid-ocean ridge, stretching over 16,000 kilometres.Elon.io is an online learning platformWe have an entire course teaching TOEFL Academic Vocabulary grammar and vocabulary.Start learning TOEFL Academic Vocabulary now