# 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?**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 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).**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.**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.**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.**Geniverse Demo**

Students investigate dragon phenotypes and genotypes, run breeding experiments and solve genetic problems in this demo version of the Geniverse virtual lab.**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.**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: 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?**Modeling Earth's Climate**

Examine climate data and models to explore what we might be able to predict about the Earth's future, and how sure we will be about it.**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.**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**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.**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.**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 is Meiosis?**

Explore meiosis and fertilization in dragons in a special lab that gives students the power to recombine alleles.**Will There Be Enough Fresh Water?**

Explore the question: Will there be enough fresh water for the growing human population?**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.