Boiling Point of a Liquid
By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton
Learners examine how the boiling point increases with increasing pressure. An example from industry is given.
Shapes of Simple Molecules - Part 2
By Dr. Miriam Douglass, Dr. Martin McClinton
Learners examine how five or six groups of electrons around a central atom cause the shape of the molecule to be trigonal bipyramidal, seesaw, T-shaped, linear, octahedral, square pyramidal, or square planar. Seven examples and three interactive questions are provided in this animated activity.
Absolute Zero Temperature
Learners view illustrations showing the direct dependence of the volume of a gas on temperature and consider the relationship between the Kelvin and Celsius temperature scales.
Fungal Disease Matching Exercises
By Marise Hussey
Learners test their knowledge of fungal diseases by completing six exercises.
Chytridiomycetes
By Barbara Liang
Chytrids, as members of this group are known, are found everywhere. In this animated learning object, students examine the role of chytrids and their impact on the environment.
Test Your Knowledge of Miscellaneous Bacteria
Learners match diseases with their portals of entry, causative agents, and associated vectors.
Moles
By Jill Larson
In this animated object, students are introduced to moles as a measurement.
Vapor Pressure
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.
Real Gases
In this animated activity, learners compare the van der Waals equation with the Ideal Gas Law.
Oxidation Numbers
Learners assign oxidation numbers to atoms in neutral compounds and in polyatomic ions. Six examples are worked through in detail, and three problems are provided.
Double Replacement Reactions
In this interactive object, learners identify charges on ions, write new formulas based on charge, and balance equations using coefficients.
Oxidation States of Ions
Learners examine the periodic table to identify metallic elements that have either fixed or variable oxidation states.
The Mole and Avogadro's Number
Learners examine how chemists use moles to "count" atoms by weight. Examples are given.
Medical Terminology Jukebox
By Karla Hartzheim
Learners read and listen to the pronunciation of hundreds of medical terms that are arranged in a "jukebox." The terms are listed alphabetically and according to the following categories: aerobic and anaerobic microorganisms, blood bank, coagulation, fungi microorganisms, hematology, protozoa, and urinalysis. This learning activity requires a computer that is equipped with speakers.
Calculation of Atomic Weight from Isotopic Composition
Learners examine the method for calculating the atomic weight of copper from the natural percent composition of each of its two isotopes.
Phase Diagrams
Learners examine phase diagrams that show the phases of solid, liquid, and gas as well as the triple point and critical point.
Pressure and Boyle's Law
Students examine standard pressure in this interactive object.
Melting Point and Freezing Point
Learners observe that the melting of a solid and the freezing of its liquid occur at the same temperature. The melting point is an intrinsic property and is used to identify a substance.
Covalent Bonds
In this animated object, students examine what happens when electrons share molecules.
Gas Volume vs. Temperature (Charles's Law)
In this animated object, learners examine how gas volume varies directly with absolute temperature (K at constant pressure). An example of a sample of gas at two conditions of volume and temperature is used to illustrate the law.
The Basidiomycetes of the Fungi Kingdom
Learners examine the lifecycle of basidiomycetes. Terminology and fungi examples are provided.
Antigen Presentation: T and B Cell Differentiation
By Carol Parent-Paulson
This learning object demonstrates the process by which antigens are identified, processed, and presented to mediators of the cellular immune system.
Acids & Bases
Students read different definitions of "acids" and "bases." In an interactive exercise, they identify if a substance is an acid or a base.
Virus Matching Exercises
By Kristine Snow
Learners complete two exercises. In the first quiz, they divide viruses into two categories: RNA and DNA. They later match each virus with the disease it causes.
The Corticospinal Tracts
In this animated object, learners examine the major descending tracts of the nervous system. A matching exercise completes the activity.