Learners examine ways to eliminate or minimize the wastes found in business processes. A matching exercise completes the activity.

In this animated object, learners examine the eight cranial bones, the fourteen facial bones, and the ribs.

Learners examine a table of common polyatomic ions. Eight examples are provided for practice.

Students analyze the eight single variable Boolean theorems and their expressions.

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

Learners read the definition of atomic weight and obtain the weights of elements by viewing the Periodic Table and charts that list atomic weights by name or symbol.

In this learning activity you'll explore the difference between mass and weight.

Students read an explanation of the use of weight-volume relationships and practice calculating density.

Students read about the concept of unit weight relating to the 3-phase diagram and perform calculations.

In this animated activity, students read about weight-volume relationships within a given sample of soil or aggregate. They complete problems using a 3-phase diagram.

Students read how to determine and calculate the porosity for a given sample of soil or aggregate, based on the weight-volume relationship.

In this learning activity you'll be introduced to the eight most common logical fallacies commonly used in persuasive speeches.

Students read how to determine and calculate the degree of saturation for a given sample of soil or aggregate based on the weight-volume relationship.

Students read how to determine and calculate the saturated density for a given sample of soil or aggregate, based on the mass-volume relationship. Practice problems complete the activity.

Students take a 13-question quiz to practice reading 25- and 50-division Vernier height gages.

Students read how to determine and calculate the saturated unit weight for a given sample of soil or aggregate, based on the weight-volume relationship. Practice problems complete the activity.

In this animated and interactive object, learners observe how two, three, or four groups of electrons around the central atom cause the shape of the molecule to be linear, trigonal planar, bent, tetrahedral, or pyramidal. Seven examples and eight interactive questions are provided.

Learners examine eight different kinds of faulty logic or perception that interfere with critical thinking. They are superstition, ignorance, clustering illusion, false analogies, gambler’s fallacy, irrelevant comparisons, post hoc fallacy, and slippery slope fallacy. In an interactive exercise, learners identify ways to overcome these barriers.

Students read how to determine and calculate the dry unit weight for a given sample of soil or aggregate based on the weight-volume relationship.

Learners answer eight questions about capacitors. Help pages are available.