In this animated lesson, learners read about the disulfide bond, the second strongest chemical bond in the hair. This bond can only be altered by chemicals.

In this interactive object, learners examine the properties of equality and use those properties to solve simple equations.

Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.

In this screencast, learners examine the kinds of physical and chemical changes that occur in substances.

In this interactive object, students examine a type of chemical bond known as the "hydrogen bond."

In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.

In this learning activity you'll discover how C#, attributes provide a way of associating data with an object in two forms - Fields and Properties.

In this screencast, learners examine the properties of the hydrogen bond and how the bond changes when hair is shampooed or styled.

In this screencast, we review the positions of metals, metalloids, and nonmetals in the Periodic Table and the general characteristics of each.

In this animated object, learners examine synthesis, decomposition, exchange, and reversible reactions.

Learners examine the meaning of theoretical yield, actual yield, and percent yield. They test their knowledge by solving two problems.

Learners use the coefficients in a balanced equation to develop the mole ratios of reactants and products involved in the reaction. Five interactive examples illustrate the method, and students test their knowledge by working four problems.

In this animated object, learners examine how changes in pH affect the salt bonds in strands of hair.

In this animated and interactive object, learners examine kinetic and potential energy as well as the first law of thermodynamics and the flow of energy between a system and its surroundings. Students also answer questions about exothermic and endothermic reactions

In this animated object, learners examine how the heating or cooling steps in a manufacturing process work to control a chemical reaction.

In this learning activity you'll review the six different ways in which electricity is produced: chemical, friction, heat, light, magnetism, and pressure.

In this screencast, learners examine the properties of the peptide bond and how the bond relates to the structure of hair.

In this animated activity, learners read about the properties of a square and its components. They then work practice problems to find the perimeter and area of squares.

This learning activity describes the physical properties that affect the inductance, in henries, of an inductor.

Learners study the properties of a sphere and use geometric formulas to find volume and surface area.