Students view a dc analysis of a base-biased NPN transistor.

Students read different definitions of "acids" and "bases." In an interactive exercise, they identify if a substance is an acid or a base.

Learners examine how CEC, base saturation, and soil pH work with each other to define plant nutrient availability.

Through the use of symbols and words, the learner reviews the etiologies, symptoms, and treatment of respiratory and metabolic acid-base disturbances.

Students read and test themselves on the conditions that cause specific acid/base imbalances.

Students read about how acid/base balance affects a person's health. This activity includes animation.

In this interactive object, the learner matches various disorders to the acid-base disturbances they cause.

In this animated object, learners view hydrogen and hydroxide ions in a solution. A brief quiz on the basic principles of the term pH completes the activity.

Learners read a general description of the function and structure of leaves and examine drawings and microscopic views. A matching exercise completes the learning object.

In this animated object, learners examine a systematic method for converting a decimal number (base 10) into an octal number (base 8).

In this animated activity, learners examine a systematic method for converting a decimal number (base 10) into a hexadecimal number (base 16).

In this learning activity you'll examine a systematic method for converting a decimal number (base 10) into a binary number (base 2).

Learners view several movie clips that demonstrate the use of an indicator to follow the neutralization reaction that occurs when an acid and a base are mixed. Students test their knowledge in a series of questions. Immediate feedback is given.

In this activity, you'll learn about the different data types associated with databases.

Learners tackle this interactive learning object after studying the mathematics of buying. This activity ties together the ideas of net cost, list price, trade discounts, cash discounts, net cost equivalent, and single discount equivalent, as well as the concepts of part, base, and rate.

Learners add suffixes to base words to form new verbs in this interactive exercise.

Students review the spelling rules for adding a suffix to a base word. They practice changing the "y" to "i" for some of the words that end in "y."

Students read about the three categories of interest groups: Economic, grass roots and community-based, and civil and constitutional rights.

Users calculate the tonnage required to punch holes in a specific base metal. The formula to be used is provided along with the tensile strength for various metals. A calculator is required.

In this activity, the learner will understand what denormalization is and when it's an appropriate strategy.