When you are freezing cold and a friend gives you a giant hug to warm you up, it is an example of **conduction**. Here's why:
1. **Conduction** is the transfer of heat between two objects that are in direct contact with each other. In this scenario, when your friend hugs you, their body warmth is directly transferred to your body through physical contact.
2. The heat energy from your friend's body moves to your body because molecules in contact with each other tend to equalize their temperature. So, as your friend's warmer body comes into contact with your colder body, the heat energy flows from your friend to you, helping to warm you up.
3. This is different from **radiation** and **convection**:
- **Radiation** is the transfer of heat through electromagnetic waves (like the heat from the sun reaching the Earth).
- **Convection** involves the transfer of heat through the movement of fluids or gases (like warm air rising and cool air sinking).
Therefore, the act of your friend giving you a hug to warm you up falls under the category of **conduction** due to the direct transfer of heat through physical contact.
