Science, Tech, Math › Science Homogeneous: Definition and Examples Share Flipboard Email Print RapidEye / Getty Images Science Chemistry Chemical Laws Basics Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated January 12, 2020 "Homogeneous" refers to a substance that is consistent or uniform throughout its volume. A sample taken from any part of a homogeneous substance will have the same characteristics as a sample taken from another area. Homogeneous Examples Air is considered a homogeneous mixture of gases. Pure salt has a homogeneous composition. In a more general sense, a group of schoolchildren all dressed in the same uniform may be considered homogeneous. Antonym In contrast, the term "heterogeneous" refers to a substance that has an irregular composition. A mixture of apples and oranges is heterogeneous. A bucket of rocks contains a heterogeneous mixture of shapes, sizes, and composition. A group of different barnyard animals is heterogeneous. A mixture of oil and water is heterogeneous because the two liquids do not mix evenly. If a sample is taken from one part of the mixture, it may not contain equal amounts of oil and water.