A clapperboard is used to synchronize film with what?

A civil war known as the War of a Thousand Days broke out in which South American country in 1899? Which leader of civil disobedience had the middle name Karamchand? What is a legal claim upon property to secure payment of a debt? What makes a "clap" in a rainstorm? A classic 1900 book describes which dog: "He was not gray; he was a little black dog, with long silky hair"? A classic 1936 book about the literary peak of Boston and Concord was called "The Flowering of..." what? Complete the title of the classic 1955 children's book by Crockett Johnson: "Harold and the ___ Crayon". Complete the title of Jean M. Auel's classic 1980 novel: "The Clan of the Cave ___".