[ 445 ] Physical Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Solid Liquid Gas Based on the model, which state change increases the density of a substance? A. gas to liquid B. solid to gas C. liquid to gas D. solid to liquid The term exothermic describes a process in which energy is released, usually as thermal energy. The term endothermic describes a process in which thermal energy is absorbed. Which of the following is an example of an exothermic process? A. a candle burning B. a snowbank melting C. a loaf of bread baking D. a plant making sugar