Chemical mixtures contain two or more distinct chemical components in either a heterogeneous or homogeneous state. They do not have a constant chemical composition and cannot be represented by a chemical formula. The substances in a mixture, regardless of how thoroughly they are mixed, do not react with each other chemically. A heterogeneous mixture consists of substances that have distinct and different phases, such as ice cubes and water. Homogenous mixtures, in contrast, consists of substances in a single phase, as in a mixture of gases.
Solutions and Mixtures. (2000). In World of Chemistry. Detroit, MI: Gale. Retrieved from http://link.galegroup.com/apps/doc/CV2432500457/SCIC?u=61wa_corpus&sid=SCIC&xid=c41f8fbd
There are two main categories of mixtures: homogeneous mixtures and heterogeneous mixtures. In a homogenous mixture all the substances are evenly distributed throughout the mixture (salt water, air, blood). In a heterogeneous mixture the substances are not evenly distributed (chocolate chip cookies, pizza, rocks).
Ducksters Education Site. (n.d.). Chemistry for Kids: Chemical Mixtures. Retrieved from https://www.ducksters.com/science/chemistry/chemical_mixtures.php
Paterson, D. (2018). How to Teach Mixtures and Solutions. Retrieved from https://eic.rsc.org/cpd/mixtures-and-solutions/3008735.article