In your own words, tell me how an element, molecule, and compound are used to make different substances. All three must be mentioned in order to receive full credit.

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve