What is the purpose of an “indicator”? Many fruits, vegetables, and flowers are acid base indicators. Give two examples of common indicators and the color of each in an acid and a base.

Which of these describes how heat is transferred by convection* a. sunlight travels through space without the aid of fluids or solids. b. warm air rises and takes the heat with it, eventually, it cools and sinks c. air at the equator rises and sinks at the poles. d. air molecules touch the warm ground, heating them up *not conduction