Discovering Chemical Changes

Chemical changes create new substances with different properties. The molecules are rearranged, and you might see color changes, gas bubbles, or even heat and light being released.

Signs of Chemical Changes

• Color change (like apple slices turning brown)
• Formation of gas (bubbles when vinegar and baking soda mix)
• Release of energy (light, heat, or sound)
• Formation of a solid (precipitate)

Chemical Changes in Everyday Life

Chemical changes are everywhere! Cooking, rusting, burning, and even digesting food in your body involve chemical changes.

Can Chemical Changes Be Reversed?

Most chemical changes are not easily reversible. Once wood burns to ash, it can't turn back into wood!

Why Study Chemical Changes?

Knowing about chemical changes helps us cook safely, prevent rust, and even develop new materials.