What are measurments based on powers of ten

Tall, cone-shaped mountains in which layers of lava alternate with layers of ash are called a. shield volcanoes. b. cinder cone volcanoes. c. composite volcanoes. d. lava plateaus. select the best answer from the choices provided a b c d i need asap

In what for do plants utilize nitrogen? why do they need nitrogen?

Which law represents a balanced chemical equation?