A pure substance is something which is not combined with anything. Essentially as long as it is made from the same material it is a pure substance. Distilled water is a pure substance because it only contains water molecules. Some sugar cubes are pure because they only contain sucrose molecules.
Mixtures are found throughout every day life. They are a combination of two or more substances.
An example is water mixed with cordial or steel, which is a combination of iron and copper.
Once you think you understand the difference between pure and non-pure have a shot at the questions bellow
Everything is made up of something. Tiny little things called atoms make up everything in the universe. On a bigger scale, we can break things up into pure and mixed substances.
We can combine multiple pure substance to form a mixed substance.
If our mixtures contain large particles, which float before eventually sinking they are called suspension.
Snow globes are suspension, because when you shake it, the ‘snow’ is suspended in the water for a short while, before it falls to the bottom.
This is why we often have to shake or stir a suspension mixture before using it.
Since we can mix so many different pure substance together, creating tones of different mixtures, we have categories for different mixtures.
Suspension mixture
Colloid mixtures
Sometimes, no matter how long you wait a mixture will just not separate.
Emulsions mixtures
These mixtures are actually colloids of two or more liquids.
Usually your have a ‘base’ liquid, while the other liquids are much smaller and spread through the base liquid.
Milk has tiny fat and oil molecules which spread through the base liquid (water). Sometime, if you let these mixtures settle, tiny droplets float up (opposite to suspension).
