For the following amino acids, draw a triangle around the amine group, draw a square around the carboxyl and circle the side group.

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together

What produces wave a)sound b) heats c)transfer of energy d)vibrations

Which is an example of a reversible physical change?