Mixing and separating solids

• Mixing solids means combining 2 or more different solids. When you mix solids, they form a mixture,but each substance in the mixture keep it own properties.
• Separating solids means using different matter to remove one substance from a mixture of solids. This is done based on the different properties of a substance in the mixture.
• We can separate the substance in mixtures in different ways.
• What is a mixture?

  A mixture is made up of two or more different substances mixed together. The substances in a mixture are not chemically joined and so we can separate them. Mixtures can be solids, liquids or gases.
• Air is mixture of three main gases: nitrogen, oxygen and carbon dioxide.
• Some solids can be mixed and separated again by sorting and sieving.
• The substances in a mixture do not react with one another
• A mixture is made up of two or more different substances mixed together