Here's why:
* Chemical bonds hold atoms together to form molecules.
* Chemical reactions involve the breaking of existing chemical bonds and the formation of new ones.
* This rearrangement of atoms changes the composition and properties of the substances involved.
For example:
* Burning wood: The chemical bonds in the wood break down, and new bonds are formed with oxygen in the air, resulting in the formation of ash, carbon dioxide, and water.
* Cooking an egg: The proteins in the egg change their structure due to the breaking and forming of bonds, leading to a change in texture and color.
So, whenever you see bonds breaking and forming, you know a chemical reaction is taking place, leading to the creation of new substances.
