Instructional Video3:09
MinuteEarth

Why Hardwoods Are The Softest Woods

12th - Higher Ed
Not all hardwood trees have hard wood and softwoods soft wood, because these terms denote their taxonomic ancestry, not the wood's actual hardness.
Instructional Video1:03
Curated Video

Virus

6th - 12th
A very small infectious agent that can reproduce only inside other cells.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...
Instructional Video
CK-12 Foundation

Ck 12: Plant Cell Structures: Parts of a Plant Cell

5th - 8th
[Free Registration/Login may be required to access all resource tools.] Take a tour of a plant cell and see how they differ from animal cells. Also take a look at the unique characteristics that some plants have. [2:57]