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Solids can be ice

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Water is a liquid

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Chemical change is when two or more substances mix,one substance is spread evenly though the othersubstace

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Density measures how much matter is packed into one space

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2 or more elements =a compound

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Exothermic energy releases large amounts of light enrrgy

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Density measures how much matter is packed into one space

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Molecules are everywhere

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Fire and explosions are examples of extreme exothermic reactions

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Diffusion is speards around the room

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The melting point of ice is 0 degrees

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A broken pencil is a physical change

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The boiling point of water is 100c

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Compounds
Elements
Atoms
Molecules

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What chemical and physical change is

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Density= mass/volume

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2 Compunds=A Mixture

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2 or more elements = a compound

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Molecules of Compounds are represented by two or more spheres of different sizes and colours joined together

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2 elements = a compound

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Sublimation = solid into gas

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The boiling point of fresh water is 103 degrees celcius

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An explosion is also called a exothermic reaction