"Scientists define energy as the ability to get work done. This lesson free sheet explains the two states for which all energy exists: potential and kinetic.

This sheet gives the formulas for the Gas Laws. - [Cluster Statement] - Use polynomial identities to solve problems - Prove polynomial identities and use them to describe numerical relationships.

Human Body Ingredients via imaginaryfoundation: 'The average human has approximately 100 trillion cells and each cell is made of approximately 100 trillion atoms, each of which were originally created in the center of a star.' Here it is by mass:

"The hierarchy of biological classification's eight major taxonomic ranks, which is an example of definition by genus and differentia. A genus contains one or more species. Intermediate minor rankings are not shown.