A spirometer measures the capacity of which organs?

A writer of action-packed novels for young people, who published the quiet "A Child's Garden of Verses" in 1885? A species of fire ant that reached the U.S. at which Alabama port city around 1918 has been a pest in the South? A style of volcanic eruption is named for which Caribbean volcano that erupted in 1902, killing thousands? What word names a spiny sea creature or a mischievous child? A split in the Plantagenet family led to which series of civil wars in the 1400s? What is a spring-loaded door fastener called? A squad of guinea pigs tries to stop a diabolical billionaire from taking over the world in which 2009 film? How many square inches are in a square foot?