Basic Science Concepts

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Matter

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Anything that has mass and takes up space.

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Mass

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The amount of matter in an object.

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Density

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Mass per unit volume, a measure of how tightly packed matter is.

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Atom

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The smallest unit of an element, made of protons, neutrons, and electrons.

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Proton

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A positively charged subatomic particle found in the nucleus of an atom.

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Neutron

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A neutral subatomic particle found in the nucleus of an atom.

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Electron

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A negatively charged subatomic particle that orbits the nucleus.

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Element

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A pure substance made of only one type of atom.

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Compound

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A substance formed when two or more elements chemically combine.

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Molecule

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The smallest unit of a compound.