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

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

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

In this animated activity, learners examine the two major phases of cell division: mitosis and cytokinesis.

In this animated object, learners are introduced to the structure and function of animal cell organelles.

In this interactive and animated object, students distribute the valence electrons in simple covalent molecules with one central atom. Six rules are followed to show the bonding and nonbonding electrons in Lewis dot structures. The process is well illustrated with eight worked examples and two interactive practice problems.

In this well-illustrated activity, learners examine the three types of intermolecular forces: dipole-dipole forces, London or Van der Waals forces, and the hydrogen bond. Two interactive questions are included.

The student identifies the anatomical parts of the ear and learns the purpose and function of these parts. A review follows the lesson.

Students identify the parts of a triple beam balance and practice measuring the mass of objects.

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

In this interactive object, learners practice their 3D visualization skills by identifying the correct isometric view of an object. Front, side, and top orthographic views are shown.

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.