Teachers
No login. Open a lab, go full screen, talk. 62 labs have a full demo script. Each script names the misconception you will hear from the third row. Same count as Explore. 35 case studies sit beside the labs. Print a note from the article page.
Motion of a tilted sphere
Rotation, revolution, seasons, and the Moon. The clockwork that makes day, night, and the calendar.
In December, London is dark by late afternoon while Sydney is in high summer. The Earth is not closer to the Sun in July.
Third row will say: Summer happens because Earth is closer to the Sun.
Frost on a window at 07:00 in Leeds is sunlight already on the school roof in Berlin. The Sun did not jump. The planet turned.
Third row will say: The Sun moves around Earth once a day.
A full Moon over Yosemite is the same geometry a student sees from Snowdonia: the Moon is opposite the Sun, not a different Moon.
Third row will say: The crescent is Earth’s shadow on the Moon.
Eight planets, one star. Distances are the lie a classroom model always tells — we exaggerate so you can see them.
Third row will say: The model on the table is to scale.
The solar constant is a number. Latitude is why a playground in London and one in Nairobi disagree.
Third row will say: Sunspots cause seasons.
Powers of ten: Earth, then the system, then the local star field. Keep it short. You cannot see a galaxy in one glance honestly.
Third row will say: Space pictures are a single scale.
A spiral, not a calendar. Units in Ma. Life and continents are marks, not a cartoon parade.
Third row will say: Dinosaurs and humans overlap on a wall chart of equal boxes.
Umbra and penumbra are cones. The Moon’s 5° tilt is why most months miss.
Third row will say: Every full Moon is an eclipse.
Two bulges. Spring and neap are alignment, not emotion.
Third row will say: Spring tides happen in April.
A dome over a marked horizon. Date and latitude write the path. Noon altitude and day length fall out.
Third row will say: The Sun is overhead at noon everywhere.
A layered, restless shell
Crust to inner core, then the plates that carry continents. Boundaries write mountains, trenches, and faults.
A cut apple is a bad model of Earth: the ‘skin’ would be thinner than the apple’s, and the outer core is liquid metal.
Third row will say: The mantle is a sea of molten lava.
Holderness loses metres of till each year; the Himalaya gain millimetres of rock. Both are plates doing different jobs at their edges.
Third row will say: Continents plough through a static ocean floor.
250 Ma the pieces fit. Fossils agree. The ocean is not a static floor continents plough through.
Third row will say: Continents plough through static oceans.
Hawaii and Yellowstone are holes the plate is sliding over — not the same as a plate edge.
Third row will say: All volcanoes are plate-boundary volcanoes.
Magnetic stripes are a tape recorder. New crust at the ridge, older away.
Third row will say: Ocean floor is all the same age.
Rocks bend or they break. Anticline, syncline, then the three fault slips.
Third row will say: Folds only happen in soft clay.
Scotland is still rising after the ice. Hudson Bay is still rising too. The crust floats. Load it, it sinks. Unload it, it comes back.
Third row will say: The ground under our feet is a rigid floor that never moves up or down.
The Atlantic is opening. One day it will close. The Caledonides and the Appalachians are an older ocean that already did.
Third row will say: Pangaea was the only time continents gathered, and the Atlantic will stay.
Air as a heat engine
Layers, insolation, wind, cells, fronts, and storms. The film of air that writes weather.
Weather lives in a thin film. The rest of the stack is overhead, not climate.
Third row will say: Space begins just above the clouds.
The ground, not the air, takes the Sun’s punch first.
Third row will say: The air takes the Sun’s heat, then warms the ground.
A coastal school feels the sea breeze at last period for a reason.
Third row will say: Wind starts because the sea is always cold.
Air starts downhill on the pressure slope. Earth then twists the path.
Third row will say: Coriolis makes water swirl in a sink.
One cell would be the textbook. Three cells are the planet we have.
Third row will say: The equator is always the wettest place, fixed.
A cold front is a wedge, not a line on a TV map.
Third row will say: A front is a painted line.
A midlatitude cyclone is a spinning comma of fronts, not a hurricane.
Third row will say: Cyclone means hurricane.
Köppen is a map of plants pretending to be a map of weather. The tiles are biomes with a temperature–rain story.
Third row will say: Climate is the weather this week.
The Lake District is wet on the west. Penrith, just over the ridge, is drier. The mountain is a barrier, not a cloud factory.
Third row will say: Mountains make rain.
Stores, flows, and time
The water cycle as a closed budget. Reservoirs, transfers, and a basin you can drain.
A blackout after a blizzard is weather. The reason there is snow to melt into the reservoir is a closed budget of stores and transfers.
Third row will say: Water is used up.
Click the divide. Source, tributary, confluence, mouth — one budget with a rim.
Third row will say: The basin is just the channel.
Rain is the input. The river’s reply has a rising limb, a peak, a lag, a falling limb.
Third row will say: The river peaks when the rain peaks.
A UK upland nival/pluvial mix vs the Mississippi: the same year, different graphs.
Third row will say: All rivers peak in summer.
Gyres are the loops. The Gulf Stream is a warm ribbon the UK notices in the air, not as a miracle heater of every garden.
Third row will say: The Gulf Stream is why Britain has weather at all.
Density is colour. Cold salty water sinks. The conveyor is slow and global.
Third row will say: It will switch off next Tuesday.
Fast stores and slow stores. The fossil-fuel tap is a human transfer from slow to fast.
Third row will say: Burning fuel creates new carbon atoms.
The Walker cell can flip. El Niño is a warm pool shift, not a personality. UK weather language stays honest.
Third row will say: El Niño is a storm that hits London.
A Chalk well in Yorkshire and an Ogallala centre-pivot in Kansas both drink a store you cannot see. The water table is a surface, not a underground lake.
Third row will say: Groundwater is an underground river or lake.
Water carving rock
Rivers from source to mouth, then coasts, ice, karst, and folds. Landforms you can orbit.
A Lake District beck in spate and the Mississippi in flood are the same machine at different stations: steep and narrow, then lazy and wide.
Third row will say: Rivers always take the shortest path to the sea.
A mountain is not a hill with ambition. Height, slope, and a flat top are different machines.
Third row will say: Every high place is a mountain.
A waterfall is a nick point walking upstream.
Third row will say: Waterfalls stay put.
When the water slows, the load sits down: slip-off slope, levée, floodplain, delta, estuary.
Third row will say: Every river builds a delta.
A more aggressive neighbour can steal a headwater. The elbow is the scar.
Third row will say: Watersheds never move.
Constructive waves build. Destructive waves take. Longshore drift is the conveyor. Cave–arch–stack–stump is the headland’s life.
Third row will say: Sea walls fix the whole coast.
Ice is a river that can be a kilometre thick. It leaves a cirque, an arête, a horn, a U, and a pile of till.
Third row will say: Glaciers only exist at the poles.
Limestone does not just break. It dissolves along joints: pavement, swallow hole, cave.
Third row will say: Caves are lava tubes.
Yardangs are carved. Barchans are built. Wind is a sculptor where vegetation is thin.
Third row will say: All deserts are dune seas.
Holderness till does not wait for a wave. After rain the cliff rotates on a curved shear and the toe shoves the beach.
Third row will say: The sea ate the whole cliff in one bite.
The Cairngorms still carry freeze–thaw scars. Alaska still has ice wedges growing. Cold without a glacier is its own factory.
Third row will say: Every cold landform was carved by a glacier.
The skin of the land
Rock cycle, soil profile, texture triangle, weathering, and erosion. The skin of the land, in 3D.
Igneous, sedimentary, metamorphic. Arrows, not a one-way ladder. Temperature and pressure bias the path.
Third row will say: Sedimentary is ‘young’ always.
O A E B C R — a stack, not dirt. Compare brown earth, mollisol, oxisol.
Third row will say: Soil is just dirt of one kind.
Sand, silt, clay. Plot a sample. Name the class. Loam is a place on the triangle, not a brand.
Third row will say: Clay means pottery only.
Mechanical, chemical, biological — three blocks, side by side, not a ranking of virtue.
Third row will say: Weathering is weather.
Rain splash, rill, wind. Vegetation on, the A horizon stays. Vegetation off, it leaves.
Third row will say: Soil is infinite.
One Yorkshire hillside, four soils. Crest is thin and dry. Toe is thick and wet. The hill is the factory.
Third row will say: Soil type is only climate.
Sudden Earth
Quakes, volcanoes, tsunami, tropical cyclones. Sudden Earth, drawn as a process.
Focus is in the rock. Epicentre is the map dot. P, then S, then the surface wave that does the damage in town.
Third row will say: The epicentre is underground.
Viscosity is the plot. Shield, strato, rift — three shapes from one slider.
Third row will say: All volcanoes explode.
Seafloor slip lifts a water column. In deep water the wave is fast and low. At the coast it stands up.
Third row will say: A tsunami is a wind storm surge.
Eye, eyewall, rainbands. Warm sea is the fuel. A UK depression is usually a different machine.
Third row will say: Every windy UK day is a hurricane.
The 1953 North Sea flood was wind piling water onto a shelf. Katrina’s surge was the same machine on the Gulf. It is not a tsunami.
Third row will say: Every sudden coastal flood is a tsunami.
Read the map, then the hill
Contours, graticule, projections, and grid references. The classroom skill behind the map paper.
A GCSE map question is a hill wearing a disguise. The spur and the valley are the same lines, bending opposite ways.
Third row will say: Contours are paths.
Latitude is how far from the equator. Longitude is how far from Greenwich. Together they are an address, not a decoration.
Third row will say: The equator is a line of longitude.
Peel an orange and the skin tears. Every world map is a compromise. Greenland is the giveaway.
Third row will say: The classroom wall map is the true size of countries.
An OS six-figure reference is a 100 m square, not a pin. Eastings then northings. Along the corridor, up the stairs.
Third row will say: A six-figure reference is a single lamp-post.