Heat can only move one way. What way is that?

The only one way that heat can move is: From
higher temperature to lower temperature, never the other way. Examples: -- When you put an ice cube into a glass of warm soda, heat never moves out
of the ice cube into the soda, making the soda warmer.-- When you mix cold water with warm water, heat never moves out of the cold water into the warm water, causing ice to appear and the warm water to get warmer.-- When you blow your breath across a spoonful of hot soup, the soupnever draws heat out of your breath, chilling your breath and boiling the soup on the spoon.-- When you step into a warm steaming bubble bath, heat never moves from your body into the hot bath, causing your tootsies to shiver and the bath to get even hotter.