scienceCh.9 Tools A B solution a homogeneous mixture that remains uniformily and constantly mixed suspension heterogeneous mixture containing a liquis in which visible particles settle colloid heterogeneous mixture that doesnt separate heterogeneous mixture a type of mixture in which different materials are spread out unevenly homogeneous mixture a type of mixture in which all substances are uniformily spread out element matter in which all atoms are alike physical property a characteristic of a material that can be easily observed without changing the substances that make up the material chemical change a change of one substance in a material to a different substance compund a material made from two or more elements that are combined fog mixture of air and water droplets tyndall effect scattering of light by particles in a mixture chemical property a charcteristic that helps to identify a substance by describing how the substance will undergo a chemical change coagulation clumps of small particals law of conservation of mass explains that matter is neither created nor destroyed during a chemical change physical change a change in size shape or state of matter atoms the units that make up all matter