In this animated object, learners examine neutral fats, phospholipids, and cholesterol. The molecular formula and general function for each are shown.

The learner reads directions for finding the slope, intercept, and correlation coefficient for a group of ordered pairs using one of eight different scientific calculators.

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

Practice how to make research decisions using the 3 Rs.

Ions are electrically charged particles obtained from an atom or from a chemically bonded group of atoms by adding or removing electrons. Eight examples illustrate the number of protons, neutrons, and electrons in positive ions (cations) and in negative ions (anions).

The purpose of this learning object is to introduce the dental hygienist to the process of documenting a patient's dentition.

In this video, you'll review how every protein molecule of an organism is synthesized.

Students examine atomic structure and the octet rule.

Students review the rule for writing the possessive form of singular nouns that end in an "s" sound. They then complete exercises.

In this animated object, learners examine processes that do not use ATP directly including hydrostatic pressure and facilitated diffusion with carrier proteins.

In this animated object, learners examine synthesis, decomposition, exchange, and reversible reactions.

Learners read about endospores and view video clips demonstrating spore staining procedures. Correctly stained slides are shown.

In this animated object, learners trace the olfactory pathway from the nasal cavity to the olfactory cortex.

Learners view movie clips to determine the solubility of two ionic compounds. They also examine a solubility chart and predict the solubility of compounds.

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Learners follow a four-step process to determine the empirical formula of a compound from the masses of its constituent elements. The molecular formula is determined in a fifth step using the molecular weight of the compound.

In this animated object, learners examine the chemistry behind table salt.

Students examine the four factors that affect resistance of a wire: temperature, length, diameter, and the type of material from which it is made. A short quiz completes the activity.

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.

Learners match the names of parasitic organisms to the diseases they cause and the modes of transmission.