By Jill Larson
Students solve a molarity problem in a drag and drop exercise.
Conversion Between Mass and Moles of an Element
By Dr. Miriam Douglass, Dr. Martin McClinton
Atomic weights are used to convert the mass of a sample into the number of moles of the element in the sample and vice versa. Four examples are provided for practice.
By Elizabeth Yoon
In this interactive object, learners categorize different metabolic activities as catabolic or anabolic and follow a glucose molecule through the processes of glycolysis, aerobic respiration, and fermentation.
Peptide Bond Formation
By Richard Wilkosz
In this animated object, learners examine the formation of peptide bonds through dehydration synthesis.
By Barbara Liang
In this well-illustrated object, learners examine basic floral anatomy. The flower is the reproductive organ of the angiosperm.
Microbial Flora in Body Sites
By Dawn Madl
In an interactive exercise, learners identify the human body sites that harbor a normal resident flora and the sites that are sterile.
Biomolecules The Carbohydrates
Learners read a brief introduction to monosaccharides, disaccharides, and polysaccharides. The processes for dehydration synthesis and hydrolysis are shown.
The Cell: Passive Transport Diffusion (Video)
Explore what passive transport diffusion is and how it moves water through a membrane.
The Cell: Passive Transport Osmosis
In this animated object, learners examine water molecules moving through a semipermeable membrane.
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.
What Is Torque?
By Terry Bartelt
Learners read a description of torque and study the factors that cause its magnitude to change. A brief quiz completes the activity.
In this interactive lesson, students examine the quantitative relationship between chemicals in a balanced mathematical equation.
Naming Binary Ionic Compounds Containing Fixed Oxidation State Cations
By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton
Learners examine a table containing the names of common cations and anions. They then check their knowledge by answering a series of questions.
Shapes of Simple Molecules - Part 1
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.
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.
In this learning activity you'll review the structure and function of the different tissues of the human body.
Respiratory System Gas Exchange
By Bruce Forciea
In this animated object, learners examine the mechanisms for gas exchange among the lungs, blood, and tissues.
How the Brain Develops
By Mary Beth Boettcher
In this interactive learning object, learners study the parts of the brain and then test their knowledge in a drag-and-drop exercise.
The Vascular System of the Kidneys
By Becky Polk-Pohlman
Learners play a vascular system "game" to identify the arteries, capillaries, and veins that make up the renal blood supply pathway. A score is given at the end of the activity.
In this interactive object, students examine how the volume and temperature of an ideal gas relate under conditions of constant pressure and quantity.
Mole Ratios in Chemical Equations
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.
By Kristine Snow
Learners read about endospores and view video clips demonstrating spore staining procedures. Correctly stained slides are shown. The learning object includes two matching exercises.
The Cell: Passive Transport Osmosis (Video)
Explore what passive transport osmosis is and how it moves water through a semipermeable membrane.
Muscle Cell Contraction
In this animated activity, learners examine muscle cell contraction and relaxation and consider the role of calcium ions.
In this animated object, students examine what happens when electrons share molecules.