The reaction of an acid with a base, for example, results in the creation of a salt and water. Some, but not all, reactions can be reversed. See nuclear reaction. An action that results directly from or counteracts another action, especially the change in a body's motion as a result of a force applied to it.
Snakes are cold-blooded creatures, just like amphibians. When a certain animal is cold-blooded, it basically means that they are able to adapt their own internal temperature to that of their environment. When a snake is in a cool environment, their body temperature tends to drop rather quickly.
Temperature Regulation in Ectotherms. In addition to snakes and lizards, other reptiles are ectothermic, including turtles and crocodiles. Ectothermic classes include amphibians -- frogs, toads, salamanders -- and most fish and invertebrates. These animals regulate body temperature behaviorally. One strategy snakes and lizards use to acquire heat is sunning. They find a sunny spot to bask in and absorb heat from the sun. Warm rocks or other surfaces also provide heat. They cool down by burrowing, exposing themselves to the wind or finding shade.