Here's why:
* Chemical reactions involve the breaking and forming of chemical bonds. This means the atoms within the original substance rearrange themselves, creating new molecules with different properties.
* The original substance is called the reactant, and the new substance is called the product. For example, in the reaction of hydrogen gas (H₂) and oxygen gas (O₂) to form water (H₂O), hydrogen and oxygen are the reactants, and water is the product.
* Chemical reactions can be represented by chemical equations. These equations show the reactants, products, and the conditions needed for the reaction to occur.
Some examples of chemical reactions include:
* Burning wood (wood reacts with oxygen to produce ash, carbon dioxide, and water)
* Cooking an egg (the protein in the egg changes its structure due to heat)
* Rusting of iron (iron reacts with oxygen and water to form iron oxide)
Let me know if you'd like more examples or explanations about chemical reactions!
