In this animated activity, learners explore three major methods of heat transfer and practice identifying each.

In this learning activity you'll review how every protein molecule of an organism is synthesized by that organism in a prescribed process. This activity helps students understand the fundamental life process of making protein.

In this learning activity you'll study the structure of the cell membrane and construct it using the correct molecules.

In this learning activity you'll examine force, mass, and acceleration to understand this "Law of Acceleration."

In this animated and interactive object, learners identify the valves and chambers of the heart.

Learners examine the function of each part of a microscope and follow step-by-step instructions on how to focus on a specimen. They also review the proper use and care of a microscope and test their knowledge in two drag-and-drop exercises.

In this animated and interactive object, learners examine the structure and functions of granulocytes and agranulocytes. Two exercises complete the activity.

In this animated and interactive object, learners examine ventilation, external and internal respiration, and gas transport.

Learners read a brief introduction to monosaccharides, disaccharides, and polysaccharides. The processes for dehydration synthesis and hydrolysis are shown.

The learner views several animations to study Newton's First Law of Motion, also known as "The Law of Inertia."