Motion & forces · kinematics

Projectile Motion

A launcher stands on a measured range, with a distance ruler along the ground and height markers in the sky. Set the speed, angle and launch height, choose a world, and fire. Strobe dots show where the ball is every fraction of a second, so you can see that sideways motion and up-and-down motion are two separate stories.

Motion & forces · dynamics

Newton's Laws

A cart sits on a measured track with a motion sensor logging its velocity 50 times a second. Push it with a steady force, change its mass and the surface, tilt the track into a ramp, or let two carts spring apart. The free-body diagram shows every force as it acts, so you can see exactly why the cart speeds up, slows down or stays still.

Motion & forces · Hooke's law & SHM

Springs & Oscillations

A spring hangs from a clamp stand beside a metre rule. Hang slotted masses on it and measure how far it stretches, then pull the mass down, let go and time the bounce. Find out what sets the stretch, what sets the period, and what happens when you go too far.

Motion & forces · momentum

Momentum & Collisions

Two gliders float on a cushion of air, so almost nothing slows them down. Set their masses and speeds, choose how bouncy the bumpers are, and crash them together. Light gates time each glider, and the momentum bars show what is shared out and what is kept.

Motion & forces · gravitation

Gravity & Orbits

A satellite waits above a planet with real mass and radius. Fire it from a mountain top like Newton's cannon, or launch it from any height at any speed. Watch it fall, orbit or escape, then measure periods and test Kepler's laws.

Energy · thermal physics

Heat & Temperature

An immersion heater, a joulemeter and a thermometer sit on the bench beside metal blocks, metal rods, a beaker of ice and four beakers of hot water. Heat things up, race heat along the rods, melt ice into steam and keep a drink hot. Then find out why some materials need far more energy than others to warm up.

Waves & light · wave motion

Waves & Sound

An oscillator shakes a long rope, a slinky and a stretched string, and a loudspeaker sends sound to an oscilloscope or drives past you with a siren. Measure wavelengths with the ruler, time pulses with the stopwatch, hunt for resonances and make two waves cancel out.

Waves & light · ray optics

Light & Lenses

A ray box sits on an optical bench. Bounce its beam off a mirror, bend it through a glass block until it is trapped inside, focus a lens onto a screen, and split white light with a prism. Measure every angle and distance yourself, then find the rules that light obeys.

Electricity & magnetism · Ohm's law

Circuit Builder

A circuit board, a box of parts and two meters. Pick a part, tap the gap between two dots to place it, and watch charge flow the moment the loop is complete. Then measure: how current and voltage share out in series and parallel, how a lamp and a diode break Ohm's law, and what hides inside a real cell.

Electricity & magnetism · Faraday's law

Magnetism & Induction

Map the field of a bar magnet with iron filings and a compass, wind an electromagnet that picks up paper clips, then push a magnet through a coil and watch a galvanometer flick. Finish by spinning a coil to generate AC and stepping it up with a transformer.

Atoms · nuclear physics

Radioactive Decay

A Geiger counter clicks beside a sample of unstable nuclei. Watch them decay at random, measure how the count rate falls and find the half-life. Then fire alpha, beta and gamma radiation at paper, aluminium and lead, and bend the rays in a magnetic field.

Atoms & the periodic table · atomic structure

Build an Atom

Everything is made of atoms, and every atom is built from just three particles. Tap or drag protons, neutrons and electrons into the atom and watch it become hydrogen, carbon or sodium. Then make ions and isotopes, and find out which nuclei hold together.

Atoms & the periodic table · periodicity

Periodic Table & Trends

All 118 elements, with real data. Colour the table by atomic radius, ionisation energy or electronegativity and watch the patterns repeat every period. Then drop alkali metals into water and race halogens against each other to see the trends in action.

Bonding & structure · how atoms join

Chemical Bonding

Atoms join by giving away electrons, sharing them, or pooling them into a sea. Move electrons between atoms, build molecules pair by pair, and slide the electronegativity scale to see where one kind of bond turns into another.

Bonding & structure · shapes in 3D

Molecule Shapes 3D

Pairs of electrons around a central atom push each other as far apart as they can. Spin real molecules in 3D, add bonding pairs and lone pairs, and measure how the shape and the bond angles change.

Reactions & quantities · conservation of mass

Balancing Equations

Atoms are never made or destroyed in a reaction. They are only rearranged. Change the big numbers in front of each formula until every atom is accounted for. Watch the molecules multiply, and keep the pan balance level.

Reactions & quantities · the mole

Moles & Stoichiometry

Chemists count particles by weighing them. Turn a formula into a molar mass, weigh out a mole, then mix two reactants and find out which one runs out first and how much product you really get.

Physical chemistry · gas laws

Gas Laws

A sealed cylinder holds a gas of bouncing molecules, each coloured by its speed. The pressure gauge adds up every push of a molecule on the walls. Move the piston, heat or cool the gas, pump molecules in or let them out. Hold one quantity steady, record results, and discover PV = nRT for yourself.

Physical chemistry · collision theory

Reaction Rates

Zoom into a box of reacting particles and watch which collisions actually work. Then move to the bench: dissolve marble chips in acid, decompose hydrogen peroxide with a catalyst and time the vanishing cross. Measure, graph and explain what makes reactions go faster.

Physical chemistry · reversible reactions

Chemical Equilibrium

Two reversible reactions you can see: brown nitrogen dioxide pairing up into colourless dinitrogen tetroxide in a sealed syringe, and blood-red iron thiocyanate forming in a beaker. Watch them settle into a dynamic equilibrium, then push them with heat, pressure and concentration and predict which way they shift.

Acids & bases · pH and titration

Acid–Base Titration

Start at the pH tester: test a dozen household liquids with universal indicator and a pH meter, from stomach acid to drain cleaner. Then move to the titration bench, run sodium hydroxide from a burette into an acid one drop at a time, and use your titres to find an unknown concentration.

Electrochemistry · electrolysis and cells

Electrochemistry

Pass a current through molten and dissolved ionic compounds and watch ions migrate, gases bubble off and metals plate onto the electrodes. Then turn chemistry back into electricity: pair two half-cells with a salt bridge and read the voltage from real standard electrode potentials.

Organic chemistry · carbon compounds

Organic Molecule Builder

Snap carbon atoms into chains and branches, add double bonds and functional groups, and watch the IUPAC name, formula and boiling point update as you build. Then run the classic reactions: crack, test with bromine water, oxidise, make esters and polymers.

Unit 1 · Scale of life

Size Zoom

Dive from a meadow to a single atom, or line things up side by side. Everything is drawn at its true size.

Thirteen orders of magnitude, from ecosystem (10³ m) to atom (10⁻¹⁰ m), rendered to scale on a logarithmic zoom.

Molecule · DNA, RNA and proteins

Protein Factory

Every protein in your body is built from a recipe written in DNA. Copy a gene into messenger RNA base by base, send it to a ribosome, match each codon with the right tRNA, and watch your protein grow. Then break the gene on purpose and see what one wrong letter does.

Cell · organelles

Cell Explorer

A living cell in 3D, sliced open. Turn it, fly to any part, follow a protein on its delivery route, play cell doctor or race the clock.

Eukaryotic cell ultrastructure in 3D: the endomembrane system, energy organelles and the cytoskeleton, with the secretory pathway traced step by step.

Organism · photosynthesis

Pondweed Lab

A sprig of pondweed sits in water under a lamp. Every bubble rising from its stem is oxygen made by photosynthesis. Drag the lamp, warm the water, add carbon dioxide or change the light color, then record your results and find out what limits the plant.

Family · heredity

Genetics Garden

Each plant carries two copies of each gene, one from each parent. Tap the letters to change a parent's genes and read the Punnett square. Then let the bee pollinate, grow the seeds, and compare what you get with what the square predicts. Tap any grown plant to breed from it.

Population · natural selection

Moth Woods

You are the blue tit on the branch. Tap a moth and the bird swoops in to grab it. You have 20 seconds to catch 10, and missed taps scare nearby moths into flying off. The moths you fail to spot become the parents of the next generation.

Ecosystem · food chains

Meadow

Grass feeds rabbits, rabbits feed foxes. Every animal here is simulated: it wanders, eats, has babies and dies. Press play, drop in animals, trigger a drought, and watch the populations rise and crash as the food chain pushes back.