Science Common Sense

163 - How do you know when a chemical reaction has occurred?

You can know a chemical reaction happened by looking for these signs:

1. Color Change: If the color of the mixture changes, it might be a sign that a reaction occurred.
2. Bubbles Forming: If you see bubbles forming, it could mean that a gas is being released, which is often a sign of a chemical reaction.
3. Heat or Cold: If the mixture gets warmer or colder, it might be because a chemical reaction released or absorbed energy.
4. New Smells: If you notice a new or different smell, it could be a sign that a chemical reaction happened.
5. Formation of a Solid: If a solid forms from a liquid, it's likely a chemical reaction occurred.

Remember to always perform experiments under adult supervision and follow safety guidelines!