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

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

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

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.

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 view hydrogen and hydroxide ions in a solution. A brief quiz on the basic principles of the term pH completes the activity.

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 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).

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.

Students add suffixes to base words to form nouns in this interactive lesson.

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

In this animated and interactive object, learners use a memory device to identify NPN and PNP transistors. Learners also examine how much the transistors turn on when the voltage applied to the base is varied.

Learners use the Base Minus One Complement method to do octal subtraction.

Instructors complete a simple, informal inventory that helps them to see how they use the Seven Principles of Good Practice in Undergraduate Education developed by Chickering and Gamson (supported by AAHE, ACE, Johnson and Lilly foundations) in 1987.

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