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 soup

never 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.

Heat moves in three ways. Radiation, convection and conduction.