sentences: salt is a mean of pure mosses & land is a mean of exhibit & orange symbols is a mean of probability ->  water, lemon juice, sugar are three substances  water, lemon juice, sugar are three substances & turbine is made of water, orange juice, and salt ->  lemonade is made of at least three substances  lemonade is made of at least three substances & an middle is formed by one or more collision combined together physically -> lemonade is a kind of mixture