What is a common characteristic of sound waves? A)They are created by vibrations.

B) They move at the speed of light.

C)They travel fastest through empty space.

D) They travel in straight lines toward the source.

Match the acid base pairs by arranging the acid name with the conjugate base formula. hydrogen carbonate hydrogen phosphate carbonic acid read water sulfuric acid phosphoric acid a. co32- b. hso4- c. hco3- d. po43- e. h2po4- f. oh-

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

Which substance is a steroid? cholesterol fatty acid monosaccharide trans fat