Interactive learning through exploration

Change the variables.
Watch the system respond.

VariableVista is a growing collection of interactive models, simulations, and investigations designed to help students explore systems, discover patterns, and explain cause-and-effect relationships.

No student accounts required Interactive and classroom-ready Free to explore
A person overlooking a landscape filled with graphs, variables, and scientific data visualizations

Model Library

Browse models by subject

Choose a subject area, then open any model directly. All models are free to explore and require no student account.

25 models • 25 worksheets • 5 subject areas

Model Collection

Biology & Lab Skills

Cell biology, genetics, microscopy, physiology, ecosystems, and laboratory investigations.

7 models
Biology / Lab Skills Grades 9–12

Photosynthesis & Cellular Respiration Lab

Investigate photosynthesis using a virtual Elodea experiment. Test light, carbon dioxide, and temperature, count oxygen bubbles, and compare photosynthesis with cellular respiration.

Elodea pre-lab investigation Repeated experimental trials Oxygen bubble data Digital lab alternative
Open Photosynthesis Lab Download Photosynthesis Investigation
Biology / Homeostasis Grades 9–12

Heart Rate & Homeostasis Lab

Investigate how heart rate responds to repeated exercise and recovery. Collect virtual pulse data, graph the response, and explain how the body returns toward a stable internal condition.

Resting heart-rate baseline Three repeated activity sets Recovery measurements Live data graph & CSV export
Open Heart Rate & Homeostasis Lab Download Heart Rate & Homeostasis Investigation
Biology Grades 9–12

Mitosis & Cancer Cell Cycle Investigator

Analyze microscope samples, calculate mitotic index, test cell-cycle regulation, and use multiple lines of evidence to identify disrupted cell division.

Microscope cell analysis Mitotic index calculations Cell-cycle regulation tests Evidence-based CER
Open Cell Cycle Investigator Download Cell Cycle Investigation

Model Collection

Chemistry

Reactions, periodic trends, gas behavior, nuclear chemistry, pressure, and evidence-based laboratory investigations.

5 models
ChemistryGrades 8–12

Balancing Chemical Equations Lab

Balance chemical reactions by changing whole-number coefficients, compare atom counts on both sides, classify reactions, and connect balanced equations to conservation of mass.

16 balancing reactionsVisual atom countsReaction classificationFive-equation challenge
Open Balancing Equations Lab Download Balancing Equations Investigation
ChemistryGrades 9–12

Periodicity Investigator

Explore the full periodic table, compare measured element properties, graph periodic trends, and use evidence to predict how atomic properties change across periods and down groups.

All 118 elementsAtomic-property graphsPeriod & group comparisonsTrend prediction challenges
Open Periodicity Investigator Download Periodicity Investigation
ChemistryGrades 9–12

Gas Laws Investigation Lab

Manipulate pressure, volume, temperature, and amount of gas, collect controlled-trial data, graph relationships, and connect Boyle, Charles, Gay-Lussac, and Avogadro laws to the ideal gas equation.

Four classic gas lawsAnimated particle chamberPV = nRT calculatorGraphs & CSV data
Open Gas Laws Lab Download Gas Laws Investigation
Chemistry / Nuclear ScienceGrades 9–12

Nuclear Decay Lab

Investigate alpha, beta-minus, and gamma decay, determine daughter nuclei, build nuclear equations, compare shielding, and model radioactive half-life using both random samples and theoretical decay.

Alpha, beta & gamma decayDaughter-nuclide equationsShielding investigationStochastic half-life model
Open Nuclear Decay Lab Download Nuclear Decay Investigation

Model Collection

Earth & Space Science

Plate tectonics, earthquakes, meteorites, stars, galaxies, and evidence from Earth and space.

5 models
Earth & Space Science Grades 7–9

Earthquake Hazard Investigator

Analyze seismic wave data, calculate the distance to an earthquake, triangulate its epicenter, and use hazard patterns to help a community prepare for future earthquakes.

P- and S-wave analysis Epicenter triangulation Student calculations Hazard-pattern investigation
Open Earthquake Hazard Investigator Download Earthquake Hazard Investigation
Earth & Space Science Grades 7–12

Ocean Floor Mapper

Scan a simplified Pacific transect from Papua New Guinea to Peru, construct a depth profile, identify ocean-floor features, and use evidence from ridges and trenches to predict plate motion.

Student-controlled sonar Hidden seafloor investigation Ocean-floor labeling Plate-motion predictions
Open Ocean Floor Mapper Download Ocean Floor Mapping Investigation
Earth & Space Science Grades 7–12

Meteorite Locator and Records

Explore meteorite records on an interactive world map. Search individual meteorites, compare observed falls with later finds, and investigate patterns in location, year, mass, and classification.

32,186 mapped locations 45,716 total records Observed falls and finds Search and filter tools
Open Meteorite Locator and Records Download Meteorite Records Investigation

Model Collection

Earth & Environmental Science

Energy, climate, wildfire, groundwater, transportation, and human–environment systems.

5 models
Earth Science Grades 7–12

Urban Heat City Builder

Build a heat-resilient city by balancing roads, buildings, trees, green spaces, water, shade, construction costs, and the urban heat-island effect.

Retro city builder Construction budget Heat and resilience scores PNG download
Open Urban Heat Model Download Urban Heat Investigation
WILDFIRE SYSTEMS HIGH RISK
Earth Science Grades 7–12

Wildfire Systems

Build a 10 × 10 landscape, place an ignition point, and test how fire danger, drought, temperature, wind, and terrain affect the direction and rate of wildfire spread.

Editable terrain grid Wind-driven fire spread Live wildfire data Controlled-trial investigations
Open Wildfire Model Download Wildfire Systems Investigation

Model Collection

Physical Science & Engineering

Forces, motion, pressure, physical systems, engineering design, and evidence-based data analysis.

3 models
HOURS MINUTES
Physical Science Grades 7–12

The Flow of Time: Water Clock

Explore a working hydraulic clock inspired by Bernard Gitton’s water clock at NEMO Science Museum. Observe how reservoirs, pendulum motion, siphons, minute chambers, and hour globes work together to measure time.

Live hydraulic clock Selectable time zones Animated pendulum and siphons Fast observation mode
Open Water Clock Model Download Water Clock Investigation
Physics / Physical Science Grades 8–12

Forces & Motion Investigation

Test how mass, applied force, and friction change an object's motion. Compare continuous-force and push-and-release trials using live force data and motion graphs.

Newton's Second Law Static & kinetic friction Push & release trials Motion graphs & CSV data
Open Forces & Motion Investigation Download Forces & Motion Investigation

How It Works

Explore a system in four steps

1

Change

Adjust one or more variables using sliders, buttons, and interactive controls.

2

Observe

Watch the system respond through animations, measurements, graphs, and visual changes.

3

Compare

Run different scenarios and compare how changing conditions affects the outcome.

4

Explain

Use evidence from the model to explain patterns, relationships, and cause-and-effect connections.

Built for Classrooms

More than a simulation

VariableVista models are designed to support prediction, investigation, data analysis, systems thinking, and scientific explanation.

Explore freely Students can experiment without creating accounts.
Collect evidence Live data and graphs make system behavior visible.
Support inquiry Models can be used for guided or open investigations.
Explain relationships Students connect variables, patterns, and outcomes.
Suggested investigation

How does aeration affect fish survival?

Keep temperature, feeding, water exchange, and starting population constant. Change only the aeration level and compare the results.

Start the Investigation

About VariableVista

Models that make thinking visible

Scientific models simplify reality so learners can focus on important relationships. VariableVista models are educational tools, not real-world prediction systems. Each model includes limitations so students can consider what the model represents and what it leaves out.

Start Exploring

Ready to explore an interactive system?

Manage a digital fish hatchery, design a heat-resilient city, build Oregon’s 50-year energy plan, investigate groundwater flow, test wildfire spread, or explore how a hydraulic water clock measures time.

Explore All Models