The liver produces bile which emulsifies (separates) fat.

The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.

A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.

The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.

Tertiary consumers eat primary consumers and secondary consumers and are typically carnivorous predators. Tertiary consumers may also be omnivores. Examples include wolves, sharks, and human beings.