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matter pure substances and mixtures as we know the properties of matter are mass

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and volume and it's classified into pure substances and mixtures pure substances

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are made up of only one type of matter water is a pure substance

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Sugar is also a pure substance. We add it to our food.

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A mixture is made up of two or more substances.

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Sometimes we can see these substances or components easily.

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When we make a salad, we mix different pieces of vegetables or components.

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There are other types of mixture where we cannot see the different components like coffee with milk and sugar.

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Air is a mixture of oxygen, carbon dioxide, water vapor and other gases. We cannot see the mixture of gases.