By Dr. Miriam Douglass
In this interactive object, learners calculate the amount of heat evolved or absorbed in chemical reactions. Four practice problems are provided.
The Vertebral Column
By Barbara Liang
Learners read a brief description of the vertebral column and examine the distinctive features of the cervical, thoracic, and lumbar vertebrae.
By Debbie McClinton, Dr. Martin McClinton
Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.
Double Replacement Reactions
By Jill Larson
In this interactive object, learners identify charges on ions, write new formulas based on charge, and balance equations using coefficients.
Changes in Our World: Chemical and Physical (Video)
By Deb Simonson
In this screencast, learners examine the kinds of physical and chemical changes that occur in substances.
The Two-Neuron Knee-Jerk Reflex Arc
In this interactive object, learners examine the neuron pathway into and out of the spinal cord. They complete the activity by testing their knowledge of vocabulary and the location of spinal cord structures.
Shapes of Simple Molecules - Part 1
By Dr. Miriam Douglass, Dr. Martin McClinton
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.
Common Types of Oxidation-Reduction Reactions
By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton
Learners identify combination, decomposition, displacement, and combustion types of redox reactions. They also watch a video clip that demonstrates the reaction of sodium and water.
The Anatomy of the Heart (Video)
By Becky Polk-Pohlman
In this video learners view the valves and chambers of the heart.
The Brain - Anatomy and Function (Video)
By Susan Heitman
In this screencast, learners review and reinforce their knowledge of brain anatomy and function.
In this interactive and animated object, learners examine the characteristics, ecological importance, and lifecycle of the ascomycetes of the fungi kingdom.
Atomic Structure and Ionic Bonding
In this animated object, learners examine the chemistry behind table salt.
Vapor pressure is the pressure exerted by molecules in the gas phase in equilibrium with a liquid or a solid. Two examples are used to illustrate vapor pressure: the drying of clothes and the evaporation of ice.
The definition of an isotope is illustrated using the three isotopes of carbon. The three isotopes of hydrogen are discussed as exceptions.
Ideal Gas Law
In this interactive object, learners use the ideal gas law to solve a practice problem.
In this animated activity, learners compare the van der Waals equation with the Ideal Gas Law.
Biomolecules - The Lipids (Video)
In this animated object, learners examine neutral fats, phospholipids, and cholesterol. The molecular formula and general function for each are shown.
Science Lab Equipment - Pt 1 (Video)
By Bruce Bell
In this screencast we are introduced to the lab equipment used to contain and dispense chemicals.
In this animated object, students examine what happens when electrons share molecules.
Energy in Chemical Reactions
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
By Jonathan Harris
In this animated learning object, students examine the life cycles of a virus.
White Blood Cells
In this animated and interactive object, learners examine the structure and functions of granulocytes and agranulocytes. Two exercises complete the activity.
The Combined Gas Law
Learners combine Boyle's Law and Charles's Law to solve for the pressure, volume, and temperature of a gas sample under two sets of conditions.
Parasite Matching Exercises
By Elizabeth Yoon
Learners match the names of parasitic organisms to the diseases they cause and the modes of transmission.
Red Blood Cells
In this animated and interactive object, learners examine the red blood cell's life cycle and function. A brief exercise completes the activity.