Simulations
View our unlocked repository of interactive Simulations. To view a Simulation, click the Simulation’s title.
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Simulation
Radioactive Decay
In this simulation, students will investigate why radioactive decay occurs, the changes that occur in the nucleus during three common types of decay (alpha, beta, and gamma decay), and what types of materials can be used to protect against each type of radiation. Students will also have a chance to test their understanding of these concepts with a 10question quiz.

Simulation
Colligative Properties
In this simulation, students will investigate the effects of different solutes, and different amounts of those solutes, on the boiling point and freezing point of a solution. Students will see particlelevel animations of boiling and freezing with different types and amounts of solutes, as well as graphical representations of the results of each trial.

Simulation
Graphing
In this simulation, students will be introduced to good graphing techniques and how to interpret data presented in a graph. They are introduced to the TAILS acronym (Title, Axes, Intervals, Labels, Scale) to help them remember how to set up a graph and the concepts of line of best fit, positive and negative correlation, and interpolating and extrapolating. Then students complete a sixquestion quiz on these topics.

Simulation
Galvanic/Voltaic Cells 2
In this simulation, students can create a variety of standard and nonstandard condition galvanic/voltaic cells. Students will choose the metal and solution for each half cell, as well as the concentration of those solutions. They can build concentration cells and other nonstandard cells, record the cell potential from the voltmeter, and observe the corresponding oxidation and reduction half reactions.

Simulation
Galvanic/Voltaic Cells
In this simulation, students select different metals and aqueous solutions to build a galvanic/voltaic cell that generates electrical energy and observe the corresponding oxidation and reduction half reactions.

Simulation
Metals In Aqueous Solutions
In this activity, students will run simulated tests of various metals in aqueous solutions to determine the relative reactivity of these metals. A total of eight metals will be observed in various combinations with the corresponding metal nitrate solutions and hydrochloric acid. Students will interpret the data collected to construct an activity series of the elements used in this simulation.

Simulation
Understanding Specific Heat Capacity
In this simulation, students will play the role of engineer. They will calculate the specific heat capacity of various materials to determine which ones meet stated criteria and then perform a cost analysis to determine which material to use.

Simulation
Intermolecular Forces
In this simulation, students will review the three major types of intermolecular forces and answer quiz questions using the relative strengths of these forces to compare different substances given their name, formula, and Lewis structure.

Simulation
Preparing Solutions
In this simulation, students will complete a calculation in order to
determine either the molarity of solution, volume of solution, or mass of solute needed. Additionally the associated particle diagram for the solution will be displayed to help students better visualize the solution at the particulate level. Finally, students will gain familiarity with the proper lab techniques for preparing a solution as they are lead through a stepbystep animated process demonstrating this procedure. 
Simulation
Predicting Products
In this simulation, students will reference an activity series and a solubility chart to accurately predict the products of single replacement and double replacement chemical reactions. Associated particle diagrams will be displayed to help students better comprehend the reaction at the particulate level. Students will also be asked to balance the chemical equation. The simulation is designed as a five question quiz for students to use multiple times.

Simulation
States of Matter and Phase Changes
In this simulation, students will participate in a 10 question quiz. Some questions will challenge students to analyze data to identify the correct state of matter for a specific sample, and then connect the chosen state with an animated particle diagram. In addition, students will examine the behavior of particles in an animated sample as they undergo a phase change, and must correctly identify the change that occurs.

Simulation
Reaction Rates
In the May 2018 simulation, students investigate several factors that can affect the initial rate of a chemical reaction, including concentration, temperature, surface area of the reactants, and addition of a catalyst.

Simulation
Chemical Reactions and Stoichiometry
In this simulation, students practice classifying different chemical reactions, balancing equations, and solving stoichiometry problems.

Simulation
Predicting Shifts in Equilibrium: Q vs K
In this simulation, students will take a 15 question quiz. Each quiz question has two parts. The first part requires the student to calculate the value of the reaction quotient, Q. In the second portion of the question, the students will compare the value of Q to the equilibrium constant, K, and predict which way the reaction will shift to reach equilibrium. The simulation includes five different reactions which each have three scenarios: Q > K, Q = K, and Q < K.

Simulation
Measuring Volume
In this simulation, students will participate in a 10 question quiz. The quiz questions are each made of two parts, with the first part requiring the student to analyze an image of a graduated cylinder in order to report an accurate measurement. Students must use the correct number of digits based on the markings presented on the cylinder when reporting the measurement. In the second portion of the question the students will determine the uncertainty value of the graduated cylinder, again by analyzing its markings. The simulation is made up of several different sizes of graduated cylinders, each containing unique markings, so students will be challenged to analyze each individually.

Simulation
Isotopes & Calculating Average Atomic Mass
In the May 2017 simulation, students first learn how the average atomic mass is determined through a tutorial based on the isotope abundance for Carbon. Students will then interact within a workspace where they will select the number of isotopes, the mass of each isotope as well as their abundancies in order to successfully build a mystery element. Finally they will use their choices to calculate the average atomic mass of the mystery element.

Simulation
HalfLife Investigation
In the March 2017 simulation, students will have the opportunity to investigate the decay of two samples of unstable atoms. Students will interact with the simulation in order to decay the unstable samples resulting in a visual and graphical interpretation of halflife.

Simulation
Energy Changes in Chemical Reactions
In the November 2016 simulation, students will evaluate the energy changes in an endothermic and an exothermic chemical reaction. Students will have the opportunity to compare how energy is absorbed and released in each reaction, and will make a connection between the standard energy diagrams associated with each reaction type.

Simulation
Ionic & Covalent Bonding
In the September 2016 simulation, students investigate both ionic and covalent bonding. Students will have the opportunity to interact with many possible combinations of atoms and will be tasked with determining the type of bond and the number of atom needed to form each. Students will become familiar with the molecular formula, as well as the naming system for each type of bond and geometric shape, when applicable.

Simulation
Periodic Trends II: Electron Affinity, Atomic Radius & Ionic Radius
The May 2016 simulation is a followup to the March 2016 simulation. Students will focus their investigation on the electron affinity of an atom. Through the use of this simulation students will have the opportunity to examine the formation of an anion as well as compare the atomic radius of a neutral atom to the ionic radius of its anion.

Simulation
Periodic Trends: Ionization Energy, Atomic Radius & Ionic Radius
In this simulation for the March 2016 issue, students can investigate the periodic trends of atomic radius, ionization energy, and ionic radius. By choosing elements from the periodic table, atoms can be selected for a side by side comparison and analysis. Students can also attempt to ionize an atom by removing its valence electrons. Quantitative data is available for each periodic trend, and can be further examined in a graph.

Simulation
Gas Laws Simulation
The simulation for the November 2015 issue allows students to investigate three of the fundamental gas laws, including Boyle’s Law, Charles’ Law and GayLussac’s Law. Students will have the opportunity to visually examine the effect of changing the associated variables of pressure, volume, or temperature in each situation. Also, students will analyze the gas samples at the particle level as well as manipulate quantitative data in each scenario. Finally students will interpret trends in the data by examining the graph associated with each of the gas laws.

Simulation
Density
The simulation for the September 2015 issue allows students to investigate the effect of changing variables on both the volume and the density of a solid, a liquid, and a gas sample. Students will analyze the different states of matter at the particle level as well as quantitatively.

Simulation
Heating Curve of Water
In the May 2015 issue, students explore the heating curve for water from a qualitative and quantitative perspective. Students compare illustrations of each physical state depicted on the curve and calculate the energy required to transition from one state to another.

Simulation
Exciting Electrons
In the March 2015 issue, students explore what happens when electrons within a generic atom are excited from their ground state. They will see that when an electron relaxes from an excited state to its ground state, energy is released in the form of electromagnetic radiation.

Simulation
Comparing Attractive Forces
In the November 2014 issue, students explore the different attractive foreces between pairs of molecules by dragging the "star" image. In the accompanying activity, students investigate different types of intermolecular forces (London dispersion and dipoledipole). In the analysis that follows the investigation, they relate IMFs (including hydrogen bonding) to physical properties (boiling point and solubility).

Simulation
Balancing Chemical Equations
The simulation for the September 2014 issue comes from PhET and helps students practice balancing chemical equations. AACT helped fund the conversion of this popular simulation into a format that is compatible with all devices, including iPads. PhET provides teacher’s guides for many of their simulations, and teachergenerated activities that can accompany the simulations.