Name some clues that a chemical change has happened.

There may be many indicators of a chemical change. Here are a few although not all can categorically indicate a chemical change: •Gas or bubbles are formed

•Heat, light, or sound is given off
•Change in color
•Different taste or smell (never taste or smell anything in a chemical lab, unless directed to do so.)
•New substance is formed (a precipitate)
•Temperature (exothermic or endothermic reactions)

•the color changes

•the texture (the way something feels) changes, and can't be changed back
•gas bubbles are formed
•a new substance is formed
•energy is taken in or given out in a reaction-burning and electricity are examples

I got these answer from wiki answers.

thank you Laruen!!

Your Welcome! :)

Wow I just help a high school student I'm only in the 7th gr ;)

Sure! Here are some clues that can indicate a chemical change has occurred:

1. Formation of a gas: If you observe the sudden release of gas bubbles or a fizzing sound, it could indicate that a chemical reaction has taken place. For example, when vinegar and baking soda are mixed, carbon dioxide gas is produced.

2. Color change: If there is a noticeable change in the color of a substance during or after a reaction, it implies that a chemical change has occurred. For instance, when iron rusts, it changes from metallic grey to reddish-brown.

3. Temperature change: A significant change in temperature can suggest a chemical reaction. It could be either an increase (exothermic) or decrease (endothermic) in temperature. A classic example is mixing vinegar and baking soda, where you can feel a temperature change due to an endothermic reaction.

4. Formation of a precipitate: When a solid substance forms and settles out of a solution, it indicates the occurrence of a chemical reaction. An example would be when silver nitrate solution is mixed with sodium chloride solution, resulting in the formation of a white precipitate (silver chloride).

5. Release or absorption of light: Some chemical reactions emit light, indicating a chemical change. This is observed in phenomena like combustion, bioluminescence, or certain chemiluminescent reactions.

Remember, these clues alone may not provide conclusive evidence of a chemical change. It is essential to consider multiple clues and analyze them in conjunction with each other.