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
Autoimmune disease

Autoimmune disease

A condition in which the immune system attacks cells, organs or tissues in the body.

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Hale-Bopp

Hale-Bopp

One of the brightest comets to be seen for decades, reaching its peak on 1 April 1997.

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Ultraviolet light

Ultraviolet light

Electromagnetic radiation.

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Continental crust

Continental crust

The uppermost layer of the Earth.

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Epicenter

Epicenter

The point on the Earth's surface directly above the point at which an earthquake originates.

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Pyroclastic flows

Pyroclastic flows

Flows of substances from a volcanic eruption.

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