All except one of the following words are examples of compound nouns. which noun is not compound? a. toothpaste b. bedroom c. gaggle d. balance beam select the best answer from the choices provided a b c d

a constant variable, normally called a controlled variable, is the term for a variable that remains constant throughout an experiment, though other variables may change. an example is the water pressure for a faucet when measuring the amount of water released when the faucet is opened to various increments.