IGCSE Chemistry: topic 13 Carbonates, a 7m 25s video lesson by Sal Sciab:
What is the Limestone Cycle? in 4m (The Virtual School):
What are the uses of Limestone? in 5m (The Virtual School):
Scientific Eye – Limestone (a 19m video).
GCSE Bitesize has revision pages (that take you through the topic), a test and an activity – just scroll down to ‘Limestone and building materials’. For Doc Brown’s Chemistry quizzes, word-fills, crosswords and study notes go here and just scroll down to ’10.Limestone Uses and Chemistry’.