Emily made a cup of tea and stirred it with a spoon. The spoon became warm. How was the heat from the tea transferred to the spoon?

The heat from the tea was transferred to the spoon through a process called conduction. Here's how it works:

1. Emily pours hot tea into a cup. The tea is at a higher temperature than the spoon.

2. She then places the spoon in the hot tea. The part of the spoon submerged in the tea comes into direct contact with the hot liquid.

3. Heat energy from the hot tea particles is transferred to the cooler spoon particles they come into contact with. This is conduction, where heat is transferred through a solid (or between a solid and a liquid/gas in direct contact) from a region of high temperature to a region of low temperature.

4. As more and more heat energy is transferred from the tea to the spoon, the spoon's temperature increases and it becomes warm to touch.

5. The spoon will continue to get warmer until it reaches the same temperature as the tea, at which point heat transfer will stop because there is no longer a temperature difference.