In this learning activity you'll explore Russia's Lake Baikal, the largest lake in the world.
By Virginia Kirsch
Students read about the Caspian Sea and use a map to identify the five countries that surround it.
Horn of Africa
Students read about the countries that make up the Horn of Africa and locate them on a map.
European Union: Part 3
Learners identify the countries waiting to be admitted to the European Union. A map exercise completes the activity.
In this learning activity you'll locate the countries of Central America on a map.
Fluid and Electrolytes
By Patricia Stroupe
In this animated object, learners examine the structure and function of intracellular and extracellular fluid. They also read about the most common electrolytes in the body and complete a matching exercise to test their knowledge.
By Rosie Bunnow
In this scenario, learners put themselves in the place of a safety director at a local company. They watch video of an injury-causing incident and propose changes to company policies and procedures to try to maintain a safe environment.
Regulators of Blood Osmolality and Blood Volume
By Debbie Heinritz
In this learning object, you will learn about four blood osmolality and volume regulators, their sites of production, their sites of action, and the results of those actions.
Torque Sequence of Two Mating Surfaces
By James Bourassa
In this interactive object, learners demonstrate the proper tightening sequence for mechanically joining two mating surfaces.
By Kathleen Lee
In this animated and interactive object, learners conduct an experiment online to illustrate how a greater number of particles in a "vessel" increases osmotic pressure.
A quiz about water, hydration, dehydration, and the human body.
Test your knowledge of environmental issues
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