Here's a breakdown:

* Endothermic: Means "heat inside".

* Energy Input: Endothermic reactions require energy from their surroundings to occur. This energy is usually in the form of heat, but it can also be light or electricity.

* Temperature Change: When an endothermic reaction takes place, the surrounding environment feels cooler because the reaction is absorbing heat.

Example:

* Melting Ice: Melting ice cubes is an endothermic reaction. The ice absorbs heat from the environment to break the bonds holding its molecules together, causing it to become liquid water. You can feel the ice getting colder, and the surrounding environment will also feel slightly cooler.

Other examples of endothermic reactions:

* Photosynthesis: Plants absorb sunlight to convert carbon dioxide and water into glucose and oxygen.

* Cooking an egg: The heat from the stove breaks down the protein bonds in the egg, causing it to solidify.

* Dissolving ammonium nitrate in water: This reaction absorbs heat from the water, making the solution feel cold.

Let me know if you'd like more examples or want to learn about the opposite type of reaction, exothermic reactions!