Bio, Geo, Chem
Biology, geology, and chemistry tools - life sciences, Earth processes, reactions, and molecular properties.
- Acid-Base Titration — Simulate strong and weak acid titration curves — watch the pH jump at the equivalence point and explore the Henderson-Hasselbalch buffer region.
- Allometric Scaling Explorer — Explore Kleiber's law and metabolic scaling relationships across species
- Bayesian Biosignature Update — Apply Bayes' theorem to a biosignature detection: set prior life probability, instrument sensitivity, and false-positive rate to see the true posterior.
- Biodiversity Index Calculator — Calculate Shannon, Simpson, and evenness indices from species abundance data
- Body Mass Index (BMI) Calculator — Calculate BMI from height and weight, estimate body fat with the Deurenberg equation, and see why age and athletic build change interpretation but not the BMI formula itself.
- Country Shape & Flag Challenge — Test your geographical and mathematical skills with country shapes, flag symmetries, and capital cities.
- DNA Codon Translator — Translate DNA sequences into amino acids, visualise codons, and explore the genetic code
- Earthquake Magnitude to Energy — Convert earthquake magnitude into joules and TNT equivalent, and compare nonlinear energy scaling.
- Hardy-Weinberg Equilibrium — Model allele frequencies under selection, test genotype counts for Hardy-Weinberg equilibrium with χ², and derive carrier frequencies.
- Interactive Periodic Table Explorer — Explore all 118 elements with a live periodic-trend heatmap, a states-of-matter temperature simulator, electron configurations, and Bohr diagrams.
- Lewis Structure & VSEPR Molecular Lab — Build molecular structures in 2D and explore their 3D VSEPR geometry, orbital lobes, hybridization, and bond angles.
- Michaelis-Menten Kinetics — Explore enzyme kinetics: V vs [S], Lineweaver-Burk plots, and inhibition types
- Molecular Clock Calculator — Estimate divergence time from sequence differences using the Jukes-Cantor model
- PCR Amplification Simulator — Simulate exponential DNA amplification: copy number, efficiency, and Ct values
- pH / Acid-Base Calculator — Convert between pH, pOH, [H+], and [OH-] and classify acidic or basic solutions.
- Population Growth & Chaos — Logistic growth in continuous and discrete time - from stable equilibrium to chaos
- Predator-Prey Dynamics — Lotka-Volterra population dynamics simulator.
- Punnett Square Calculator — Monohybrid and dihybrid crosses with genotypic and phenotypic ratios
- Radioactive Decay Calculator — Model exponential radioactive decay with half-life, activity, and decay curves
- Radiometric Dating Calculator — Estimate geological sample age from isotope half-life using parent fraction or parent-daughter ratio.
- Reaction Kinetics Calculator — Explore reaction rates, Arrhenius equation, and concentration-time profiles for different reaction orders
- SIR Epidemic Model — Simulate disease spread with SIR/SEIR models - R0, herd immunity, and epidemic curves