Learners follow a four-step process to determine the empirical formula of a compound from the masses of its constituent elements. The molecular formula is determined in a fifth step using the molecular weight of the compound.

In this learning activity you'll explore family structure then enter terms in a grid identifying if that family structure is determined by females, males, or both.

Learners view the three zones of platelet structure, peripheral, structural, and organelle, and read about their functions.

In this learning activity you'll study the structure of the cell membrane and construct it using the correct molecules.

Understand the pseudocode structure of variable declarations, a vital component of programming computer and industrial applications.

Understand the pseudocode structure of variable declarations

In this interactive object, learners calculate formula and molecular weights by working through five examples and two problems.

In this activity, we will explain the mechanics of site structure and the role it plays in search engine optimization.

Understand pseudocode structure of Inputs and Outputs, a vital component of programming computer and industrial applications.

Students examine atomic structure and the octet rule.

Students view an enlarged, colorful depiction of the contents of an average square inch of skin.

In this screencast, the learner identifies the kidney's internal and external structures.

Learners identify the major components of an aircraft and the functions of these components.

The learner constructs a nail and identifies the terms relating to the structures of the nail in a matching exercise.

In this interactive and animated object, students distribute the valence electrons in simple covalent molecules with one central atom. Six rules are followed to show the bonding and nonbonding electrons in Lewis dot structures. The process is well illustrated with eight worked examples and two interactive practice problems.

Explore repetition structures, which are commonly referred to as “Looping” statements, are a vital component of programming computer and industrial applications.

In this animated object, learners examine the chemistry behind table salt.

In this learning activity you'll assembles parts of a virus and match virus terms and descriptions.

Explore repetition structures, which are commonly referred to as “Looping” statements, are a vital component of programming computer and industrial applications.

In this animated object, learners examine the various connective tissue layers of the muscle organ. The terms "prime mover," "synergist," "antagonist," "origin," and "insertion" are defined.