# Modeling and Simulation

## All Modeling and Simulation Resources

**African Lions: Modeling Populations**

Explore exponential and logistic growth models to analyze population data for African lions and identify carrying capacity.**Atomic Structure**

Explore ion formation, isotopes, and electron orbital placement using interactive models of atomic structure.**Atoms and Conservation of Energy**

How does the Law of Conservation of Energy (the First Law of Thermodynamics) apply to atoms?**Can We Feed the Growing Population?**

The availability of resources affects how much food we can produce. Explore the interconnected resources that make up our agricultural system.**Catalysts**

Explore the effects of homogeneous catalysts.**Cellular Respiration**

Explore how your body converts the chemical energy of glucose into the chemical energy of ATP.**Ceramic Forces**

Explore what happens when a force is exerted on a ceramic material.**Changes in the Environment**

Students learn that different species can arise from a common ancestor if different groups have different selection pressures.**Chemical Bonds**

Explore the different kinds of chemical bonds that can form, ranging from non-polar covalent to ionic.**Comparing Attractive Forces**

Explore different attractive forces between various molecules.**Comparing Motion to Trajectory with the Qualitative Grapher**

Gain insight into the difficulties students face in learning to interpret graphs**Competition**

Use a model to study the effect of a consumer (rabbits) on two species of producers (grass and weeds).**Concentrating Charge and Electric Fields**

Take the same amount of charge and try spreading it out or concentrating it. What effect does that have on other moving charged particles?**Conflicting Selection Pressures**

Observe how heredity and natural selection allow a population to adapt to a changing environment by making favorable mutations more common and unfavorable mutations less common.**Crookes Tube**

Experiment with a simulated Crookes tube, designed to provide qualitative results similar to J.J. Thomson’s experiments in which the electron was discovered.**Describing Velocity**

Learn about velocity-time graphs and their connection to corresponding position-time graphs, and determine velocity during different intervals.**Diffusion**

Investigate how the random motion and collisions of particles results in diffusion.**Diffusion, Osmosis and Active Transport**

Explore how water and ions can diffuse both passively and actively through cell membranes.**DNA to Protein**

Explore what DNA is and how proteins are synthesized from the genetic information stored in it.**Earthquakes Around the World**

In this activity you will use a computer model to investigate earthquakes and volcanic eruptions.**Electric Current**

Explore the relationships between voltage, current, and resistance that make up Ohm's Law using molecular models of circuits.**Electrons in Atoms and Molecules**

The interactions of electrons with matter are central to many technologies from transistors, diodes, and smoke detectors to sophisticated imaging, lasers, and quantum computing.**Electrostatics**

Discover how atoms can be charged, and manipulate charge and distance to examine Coulomb's Law.**Excited States and Photons**

Investigate how atoms can be excited to give off radiation.**Experiment with Ecosystems**

This open-ended series of models allows students to experiment with virtual ecosystems and test their hypotheses about producer/consumer and predator/prey relationships.**Exploring Electron Properties**

Compare the behavior of electrons to that of other charged particles to discover properties of electrons such as charge and mass.**Exponential Decay**

Learn to use exponential decay equations and interpret graphs of real-world situations.**Exponential Growth**

Learn to use exponential functions to model several real-world situations.**Gas Laws**

Explore the interrelationships of pressure, temperature, and volume with atomic models of Boyle's Law, Charles's Law, Gay-Lussac's Law, and Avogadro's Law.**Geniverse**

Students investigate dragon phenotypes and genotypes, run breeding experiments and solve genetic problems in a virtual lab.**Graphing Exponential Equations**

Learn to graph exponential functions by connecting ordered pairs.**Graphing Quadratic Equations**

Students learn to graph a quadratic equation using the coordinates of the vertex of a parabola and its x-intercepts.**Greenhouse Gases**

Use a computer model to explore how the earth's atmosphere affects the energy balance between incoming and outgoing radiation.**Heat and Light from Electricity**

How does energy change from one form to another?**How Electrons Move**

Discover the forces affecting the movement of electrons, including electric and magnetic fields.**How Fast Am I Moving?**

Investigate the relationship between slope and velocity on a position-time graph.**How Loud, How High?**

Explore the frequency, wavelength, amplitude and velocity of sound waves.**Intermolecular Attractions**

Explore how London dispersion attraction and dipole-dipole interactions explain the different boiling points of materials and apply that reasoning to DNA, antibodies, and gecko feet.**Introduction to Quantum Mechanics**

Discover the quantum nature of electrons including their wave nature, tunneling abilities, and their bound and excited states.**Inverses of Functions**

Learn to graph the inverses of a series of discrete and continuous functions.**Is There Life in Space?**

Explore the question: Can there be life outside of Earth?**Launching a Satellite**

Study how to fire something into space.**Leaf Photosynthesis**

This NetLogo model of leaf photosynthesis shows the macroscopic outcome of the reaction.**Linear Equations Word Problems**

Given a word problem, students write the equation for a line, graph it and relate the equation and line to the problem.**Linear Equations: Points, Intercepts, and Slopes, Oh My!**

Students learn to graph lines using the x- and y-intercepts of equations, as well as how to graph a line when given an equation in point-slope form.**Linear Equations: Ski Slope**

Learn about the numeric representation of the slope of a line, including using rise and run to graph lines with a given slope.**Making and Breaking Bonds**

Explore the association and dissociation of diatomic molecules.**Making Waves**

Investigate the creation of different wave shapes.**Maria's Run**

Show that the motion of objects can be described by position, direction of motion, and speed.**Meiosis**

Learn how meiosis and fertilization shuffle the alleles that offspring inherit.**Melting Ice**

What is the temperature of ice as it melts?**Modern Genetics**

Students breed dragons to learn concepts in modern genetics.**Molecular Geometry**

Use models of electron arrangement around atoms to discover how molecules form linear, trigonal planar, and trigonal pyramidal shapes.**Molecular Self-Assembly**

Explore how molecules assemble themselves into defined patterns, a process called molecular self-assembly, using a unique set of computational models.**Motion on a Ramp**

Study the motion of an object as it moves up and down a ramp.**Motion Toward and Away**

Explore different ways of describing motion on a graph.**Mystery Plant Adaptation**

Students learn that species are adapted to their environments and that variation in a species can help the species adapt to changes in the environment.**Mystery Plants Mystery**

Learn about intraspecific differences and how variation in a population can help a species adapt to living in different environments.**Natural Selection**

Students explore how changes in the environment affect both plants and animals in a simple ecosystem.**Our Solar System**

Study the planets in our solar system using a computer model.**Parachute and Terminal Velocity**

Explore the factors that affect an object’s speed as it falls through the atmosphere.**Phase Change**

Explore what happens at a molecular level as substances change phase.**Plants**

What do plants eat? This unit explores plants and how they make food.**Population Explosion**

Study how populations stay in balance with their environment and respond to various factors such as food supply and predators**Probability Clouds**

Investigate the probability map of electron orbitals.**Protein Partnering and Function**

Build "partnerships" between a protein and small molecules, explore the effects of surface charge, polarity and shape on partnering, and learn the importance of a "good fit" between molecules.**Quadratic Functions in Vertex Form**

Students learn to identify the vertex of a parabola from the vertex form of a quadratic function equation, and then graph the parabola.**Quadratic Word Problems Part 1**

Students solve two problems involving the motion of projectile objects, modeling the motion using quadratic equations.**Quadratic Word Problems Part 2**

Students solve two problems each involving the motion of projectile objects, modeling the motion using quadratic equations.**Quantum Tunneling**

Explore the unique concept of quantum tunneling and its importance to modern technology.**Radiant Energy Flow**

Explore the energy balance between incoming and outgoing radiation on the earth.**Scanning Tunneling Microscopy**

Use a virtual scanning tunneling microscope to explore the quantum tunneling effect.**Seeing Motion**

Investigate simple, straight-line motion.**Semiconductors**

Explore the structure and behavior of natural and doped semiconductors.**Solubility**

Explore molecular views of solvents and solutes to explain how substances dissolve, the differing solubilities of particular solutes in polar and nonpolar solvents, and the effects of temperature on dissolution rates and saturation.**Solving Linear Equations with the Function Analyzer**

Reveal the connection between symbolic and graphic representations of equation solving**Solving Systems of Equations**

Given a math problem, students write two equations using two variables, graph the equations and relate their graph to the problem and the solution.**Spectroscopy**

Explore why excited atoms emit different wavelengths of radiation and learn how to identify atoms based on their unique atomic spectra.**States of Matter**

How do the forces and attractions differ between the states of matter?**Sunlight, Infrared, CO2 and the Ground**

Explore how solar radiation interacts with Earth’s surface and atmosphere.**Systems of Equations Word Problems 1**

Learn to solve systems of linear equations while exploring two real-life scenarios.**Systems of Equations Word Problems 2**

Find solutions to two real-life scenarios by solving systems of linear equations.**The Predator Prey Relationship**

Students learn that selection pressure can lead to a change in the characteristics of a population.**The Virtual Ecosystem**

Students learn that organisms with similar needs compete with one another for resources.**The Virtual Field**

Learn the life cycle of organisms, variation within a species, and heritability of traits.**The Virtual Greenhouse**

Students learn about basic needs of organisms. An organism thrives in specific environments that match its specific needs.**Transformations of Functions 1: Translations**

Explore transforming a function by translation and learn how changing the function equation changes the function graph.**Transformations of Functions 2: Dilations**

Transform a function by dilation, and develop an understanding of how changing the function changes the shape of the graph.**Transformations of Functions 3: Reflections**

Transform a function by reflecting it over the x-axis or the y-axis, and learn how changing the function equation changes the shape of the graph.**Transformations of Functions 4: All Transformations**

Transform a function by changing its equation, and learn how changing a function equation changes the shape of the graph.**Transistors: The Field Effect**

The field effect transistor is the most common type of transistor.**Tree of Life**

Zoom down from what we can see with our own eyes to the macromolecules from which they are made**Variations and Adaptations**

Students determine how climate can affect ecosystems.**Was Galileo Right?**

Explore the effect of gravity on objects of various mass during free fall.**Weaving a Parabola Web with the Quadratic Transformer**

Explore how the graph of a quadratic function and its symbolic expression relate to each other**What Are Our Energy Choices?**

Explore the advantages and disadvantages of using renewable and non-renewable sources to generate electricity. What sources will supply electricity in the future?**What is Meiosis?**

Explore meiosis and fertilization in dragons in a special lab that gives students the power to recombine alleles.**What Is the Future of Earth's Climate?**

Earth’s climate is in a warming period now, due in part to enhanced human emissions of greenhouse gases. Examine climate data and models to predict Earth’s future climate.**Will the Air Be Clean Enough to Breathe?**

Air quality can suffer due to natural and anthropogenic events. Poor air quality can negatively affect human and environmental health. With more of the world becoming industrialized, will the air be clean enough to breathe?**Will There Be Enough Fresh Water?**

As the human population has grown, water use for agriculture, industry and manufacturing has increased. Explore water movement and predict water availability.**y=mx+b**

Learn to graph a line using its slope and y-intercept, or to identify the slope and y-intercept from a linear equation written in slope-intercept form.