Hindenburg Vocabulary

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Atom

Back

The smallest building block of matter; everything is made of atoms.

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Molecule

Back

Two or more atoms joined together by bonds (like H₂O = water).

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Pure Substance

Back

A material made of only one type of particle (all the same atoms or all the same molecules).

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Chemical Reaction

Back

A process where substances change into new substances with different properties.

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Physical Property

Back

A characteristic of matter that can be observed without changing it (color, shape, mass, melting point).

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Solid

Back

A state of matter with a fixed shape and fixed volume.

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Absorb

Back

To take in or soak up energy or matter (like a sponge absorbs water).

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Product

Back

The new substance(s) made in a chemical reaction.

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Reactant

Back

The starting substance(s) in a chemical reaction.

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Conservation of Mass

Back

Matter cannot be created or destroyed in a chemical reaction—the total mass stays the same.