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How do new substances form ?

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What is the reddish brown substances in the water.

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Different substances have different properties.

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Things that are too small ( or too large) to see can be studied with models.

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Substances have different properties because they are made of different groups of atoms. These groups vary in the type or number of atoms that make up the group.

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Groups of atoms repeat to make up a substance.

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Something that observed about a substance, such as color, smell, or boiling point.

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Something that can is made of all the same atoms and groups of atoms.

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The temperature at which a substance changes from the solid phase to the liquid phase.

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The temperature at which a substance changes from the liquid phase to the gas phase.

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The tiny pieces that all matter- all the stuff in the world- is made of

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The relative size of things

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A structure formed by repeating groups of atoms linked together in a large network.

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How did the rust form ?

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During a chemical reaction, one or more starting substances(reactants) change into one or more different substances.

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During a chemical reaction, atoms do not change from one type to another.

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During a chemical reaction, atoms rearrange to form different groups of atoms.

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What was the produced during the reaction between the iron pipes and the fertilizer.

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During a chemical reaction, all of the atoms that make up the reactants rearrange to form the products.

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During a chemical reaction atoms cannot be created or destroyed.