Students use algebra to rearrange formulas and solve for the missing volume, density, or mass quantity.

Learners read about lab equipment and basic safety measures. In a quiz, they view photos and determine if the lab technicians pictured are using safe practices.

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

In this screencast we are introduced to the lab equipment used to contain and dispense chemicals.

In this screencast, students read about the basic organization and structure of the periodic table of elements. Students identify elements as belonging to a group, a period, or neither.

Students practice identifying common elements from the periodic table by name or symbol.

In this interactive lesson, students examine the quantitative relationship between chemicals in a balanced mathematical equation.

Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.

Learners examine the periodic table to identify metallic elements that have either fixed or variable oxidation states.

Students solve a molarity problem in a drag and drop exercise.

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

Students examine standard pressure in this interactive object.

In this interactive object, learners identify charges on ions, write new formulas based on charge, and balance equations using coefficients.

In this interactive object, learners examine how to properly dilute hydrochloric acid.

In this colorful, interactive object, learners examine how materials on the nanoscale compare with those on the macroscale. The focus is on the difference between macroscale and nanoscale gold in both color and melting point.

In this animated object, learners examine the formation of ester bonds in the synthesis of lipids using triglyceride biosynthesis as an example. Ester bond formation is described as a dehydration synthesis reaction.

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.

Viewers watch an introduction to monosaccharides, disaccharides, and polysaccharides. The processes for dehydration synthesis and hydrolysis.

In this animated and interactive object, learners examine the inverse proportionality of wavelength and frequency and their relationship to the speed of light.

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.