The formation of a solid, also known as a is an indication of a chemical change.

The formation of a solid, also known as a precipitation reaction, is an indication of a chemical change.

Precipitation reaction talks about when a solid substance formed in the water, or the reaction upon mixing two aqueous (water-like or containing water) solutions.

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."