What scale measures acidity or alkalinity of solutions?

pH scale

In 'Night at the Museum', which famous comedic actor portrays the night guard Larry Daley? What dice-rolling game requires players to fill numerical scoring categories on a special score pad? What seafood ingredient is traditionally smoked to make kippers popular in British cuisine? What Marvel villain uses pumpkin bombs as part of his arsenal? The 'Midnight Ride' was famously ridden by which American revolutionary?