a change in temperature, and the formation of a precipitate are all evidence of a chemical reaction. NGSS 5-PS1-4: Conduct an investigation to determine whether the mixing of two or more substances ...

Instead, the atoms rearrange themselves to form new chemicals. This is known as a chemical change. The other kind of change in chemistry is a physical change, which is when a substance changes ...

Students will be able to make measurements showing that whether the process is a change of state, dissolving, or a chemical ... total mass of the substance and the liquid it dissolves in does not ...

Artificial intelligence can provide critical insights into how complex mixtures of chemicals in rivers affect aquatic life -- paving the way for better environmental protection.