In this animated object, learners are introduced to the structure and function of animal cell organelles.
Learners examine the method for calculating the atomic weight of copper from the natural percent composition of each of its two isotopes.
Learners read about lab equipment and basic safety measures. In a quiz, they view photos and determine if the lab technicians pictured are using safe practices.
Learners examine how chemists use moles to "count" atoms by weight. Examples are given.
In this learning activity you'll observe two vehicles moving across the screen at different rates then describe the motion. Additionally, you'll select the corresponding graphs of distance vs. time, velocity vs. time, and acceleration vs. time for each vehicle.
In this animated object, students examine the role equilibrium plays in everyday life. Formulas are presented in an interactive way.
Students read different definitions of "acids" and "bases." In an interactive exercise, they identify if a substance is an acid or a base.
Learners examine how vapor pressure is calculated. The vapor pressure of a liquid increases with increasing temperature. If the heat of vaporization and the vapor pressure at one temperature are known, the vapor pressure at a second temperature can be calculated.
Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.
In this interactive object, learners examine how to properly dilute hydrochloric acid.
In this animated activity, learners examine what gases are composed of and how their particles interact. They also consider several assumptions that form the basis for the Kinetic Theory of Gases.
In this learning activity you'll assembles parts of a virus and match virus terms and descriptions.
Learners read a brief description of the vertebral column and examine the distinctive features of the cervical, thoracic, and lumbar vertebrae.
In this animated object, learners read a brief description of the roles of the hypothalamus, emotions, and adrenal secretions during the stress response.
In this animated object, learners trace the olfactory pathway from the nasal cavity to the olfactory cortex.
Learners review a graphic summary of the three series of reactions that occur during cellular respiration and the net energy (ATP) yield of that process.
In this animated object, learners view molecules as they collide and move between two different solutions. They also observe what happens when the temperature of the solutions is raised or lowered.
This learning object demonstrates the process by which antigens are identified, processed, and presented to mediators of the cellular immune system.
Learners view an animated presentation showing how the pH level of a cleaning solution is controlled in a closed-loop system in a manufacturing setting. A quiz completes the activity.
In this interactive object, students examine a type of chemical bond known as the "hydrogen bond."
Students examine standard pressure in this interactive object.
In this interactive object, the learner practices identifying charges on ions.
In this animated object, students are introduced to moles as a measurement.
In this animated object, students examine the role that the solubility of water plays in various biological functions.
Vapor pressure is the pressure exerted by molecules in the gas phase in equilibrium with a liquid or a solid. Two examples are used to illustrate vapor pressure: the drying of clothes and the evaporation of ice.