Homogeneous Mixture Definition: Lesson for Kids

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  • 0:04 What Does Homogeneous Mean?
  • 0:41 Solids
  • 0:58 Gasses
  • 1:15 Liquids
  • 1:58 Homogenization
  • 2:41 Lesson Summary
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Lesson Transcript
Erin Noxon
Expert Contributor
Amanda Robb

Amanda holds a Masters in Science from Tufts Medical School in Cellular and Molecular Physiology. She has taught high school Biology and Physics for 8 years.

In chemistry, when you put one or more things together that aren't combined chemically, you start to have a mixture. There are two types of mixtures in chemistry. Today we are going to talk about homogeneous mixtures.

What Does Homogeneous Mean?

A homogeneous mixture is one that's mixed or blended together so well that all of the ingredients will not separate out, even over time. Something that's homogeneous can only be separated by a mechanical process or action, such as heat or using fine filters.

The word homogeneous comes from Latin and Greek. The prefix homo means 'same' and gene means 'kind'. The suffix -ous makes it an adjective. So when you describe a mixture as homogenous, you are saying it is 'of the same kind' throughout the whole mixture.

As we will see, homogeneous mixtures can be solids, gasses, or liquids.


One example of a solid homogeneous mixture is steel. All of the different elements that make up steel are spread evenly throughout it. It's not its own chemical substance, though; it's just a mixture. Copper and zinc can be put together to make another homogeneous mixture: brass.

Steel is a homogeneous mixture.
Steel chains.


Gasses can be homogeneous mixtures, too. The air that we breathe around us is a homogeneous mixture. It's made up of nitrogen, oxygen, carbon dioxide, and many other gasses, but you can't tell the difference when you're breathing, since it is all mixed up and spread out evenly.


A liquid that is homogenous is called a solution. A solution is a mixture made of two or more things (at least one liquid) that are mixed up together evenly. A simple example of a solution would be salt water. When salt is dissolved in water, the salt spreads out within the water evenly. If you taste it, you'll be drinking water that's salty, and you won't feel any salt crystals on your tongue. In order to separate the salt from the water, you'd have to heat the water and boil it out, leaving the salt behind. This is an example of a mechanical action like we talked about earlier.

Rain is a homogeneous mixture called a solution.
Rain is a homogeneous mixture, called a solution.

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Additional Activities

Homogenous Mixture Lab

In this lab activity, students will get the chance to identify mixtures as homogenous or not. To do this lab, you'll need two clear cups, water, oil, and food coloring. To help students identify if the mixtures are homogenous or not, remember to ask them if the liquids appear as one type or if they are two types mixed together. Homogenous mixtures always look smooth and like only one liquid.


In this activity, you're going to be creating two mixtures and determining if they are homogenous or not. To do the activity, follow the steps below, then answer the reflection questions.

  1. Fill both cups halfway with tap water.
  2. In one cup, add a few drops of food coloring and gently stir it. Record any observations in a data table like the one below, such as if the food coloring spreads out, what colors you see, how it moves in the water, or anything else you notice! Decide if the mixture is homogenous or not and also record this hypothesis in your data table.
  3. In the second cup, add a few drops of oil. Again, record any observations and whether the mixture is homogenous or not in your data table.

MixtureObservationsHomogenous or Not
Food coloring and water
Oil and water

Reflection Questions

  1. Which mixture was homogenous, and how did you know?
  2. Why do you think one mixture was homogenous and the other was not?
  3. What are some other examples of homogenous mixtures you can find in your house?


Students should see that the food coloring mixes with the water over time and, therefore, makes a homogenous mixture. The oil does not mix because it is hydrophobic and, thus, will not form a homogenous mixture. Students might choose other drinks, like coffee, tea, or Kool-Aid, as examples of homogenous mixtures. But, bath products like lotion, nail polish, or bubble bath are also great examples.

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