Science Glossary
  • 500+ key scientific terms visualized in stunning images and concise textual definitions
  • Short 30–60 second films using memorable visual and written learning cues
  • Clear and engaging, Twig Science Glossary reinforces the learning of key curriculum terms
Atomic weight

Atomic weight

A measure of the average mass of atoms of an element.

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Density

Density

Mass per unit of volume.

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Bunsen burner

Bunsen burner

A small gas burner.

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Molecular mass

Molecular mass

The mass of one molecule of a substance.

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Periodic table

Periodic table

A grid of chemical elements.

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Positive charge

Positive charge

The charge that an object has due to a lack of electrons.

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