1. Melting Ice: This is a classic example. Ice absorbs heat from the surroundings to melt into liquid water. This is a physical change, but it demonstrates the absorption of heat energy.
2. Photosynthesis: Plants use sunlight to convert carbon dioxide and water into glucose and oxygen. This is a chemical reaction, and the energy from sunlight is absorbed to drive the process.
3. Dissolving Ammonium Nitrate in Water: When you dissolve ammonium nitrate in water, the solution feels cold. This is because the process absorbs heat from the surroundings, making the solution cooler.
Remember, endothermic reactions are simply reactions that absorb energy from the surroundings, usually in the form of heat. There are many other examples in chemistry, biology, and even everyday life!
