Physics Forces and motion around a child: why things fall, the pull of the Moon and the planets, parachutes, pushes and pulls, friction, balance and the centre of gravity, riding a bike, swings and pendulums, floating and sinking, light, sound, magnets and electricity.
The physics course of Mova's primary school: 44 lessons, 729 sentences, each sentence with its syntax tree and pragmatics. Licence: CC BY-SA 4.0 (Mova corpus 0.4).
1 Why things fall: the apple and the pull of the Earth 17 sentences · Everything that has mass pulls on everything else, and this pull is called gravity. 2 The Moon, the planets and the pull that holds them 19 sentences · Swing a ball on a string round your head: the string keeps pulling the ball towards your hand and bends its… 3 Parachutes, skydivers and falling safely 17 sentences · The faster something falls and the bigger the side it turns to the air, the harder the air pushes back on it. 4 Pushes and pulls: what makes things move and stop 16 sentences · A push or a pull is called a force, and a force is what starts things moving, stops them, speeds them up or… 5 Pushes and pulls all around us 16 sentences · Every move you make is a push on something else that pushes you back: you walk forward by pushing the ground… 6 Friction: the grip that stops and helps 17 sentences · Friction is the grip between two surfaces that touch: rough surfaces pressed hard together grip a lot, smoot… 7 Living with friction: oil, wheels and grip 17 sentences · To make it smaller, we put oil between rubbing parts, or we use wheels and ball bearings so that things roll… 8 Balance: the centre of gravity 15 sentences · Every object acts as if all its weight sat at one point, its centre of gravity, and it balances when that po… 9 Riding a bike: why it stays up 18 sentences · A bike stays up not by holding still but by steering: whenever it starts to tip, you turn the front wheel a… 10 Swings and pendulums 17 sentences · A swing is a pendulum: a weight hanging from a point, going back and forth with its own steady rhythm. 11 Floating and sinking: the push of the water 18 sentences · Water pushes up on anything you put in it, and the push is as big as the weight of the water the thing moves… 12 Floating in the real world: ice, submarines and balloons 16 sentences · The rule of floating works for ice, oil, ships and even air: whatever is lighter for its size rises above wh… 13 Water safety and the ocean 15 sentences · The deeper you go in water, the harder it presses, because more and more water is piled up above you; you fe… 14 The air presses on everything 14 sentences · We live at the bottom of a deep ocean of air, and all that air above us has weight, so it presses on everyth… 15 Wind and weather 18 sentences · Wind is simply air on the move, and air moves from places where it presses harder to places where it presses… 16 Pressure tricks: pumps, tyres and vacuums 17 sentences · Air always moves from where it is squashed and presses harder to where it presses less, and many machines in… 17 What sound is: wobbles in the air 17 sentences · Every sound starts with something wobbling very fast: a guitar string, a drum skin, or the vocal cords in yo… 18 Thunder, sirens and how fast sound travels 17 sentences · Sound is fast, but nowhere near as fast as light: in air it goes about one kilometre every three seconds, wh… 19 Bangs and loud sounds: firecrackers and ears 18 sentences · A bang is one sudden, hard shove on the air: instead of a gentle wobble, the air is pushed out all at once i… 20 Light and shadows 16 sentences · Light comes from things that shine, like the Sun, a lamp or a fire, and it travels in straight lines, faster… 21 Mirrors, rainbows and the blue sky 14 sentences · A mirror is so smooth that light bounces off it neatly, at the same angle it arrived, so the picture stays w… 22 Lenses and eyes 17 sentences · A lens is a piece of clear glass or plastic with curved sides that bends light on its way through; a lens th… 23 Heat moves: hot to cold 16 sentences · Heat always flows from a hotter thing to a colder thing, never the other way, until both are the same temper… 24 Melting, freezing and boiling 17 sentences · Water can be solid ice, liquid water, or an invisible gas called water vapour, and adding or taking away hea… 25 Keeping warm and keeping cool: insulation and sweat 17 sentences · A woolly jumper does not make any heat; your body makes it, and the jumper traps still air between its fibre… 26 Static electricity: balloons, hair and sparks 17 sentences · Everything is made of tiny bits that carry electric charge, and rubbing two things together can move some of… 27 Batteries, circuits and how electricity flows 14 sentences · Electricity only flows when it has a complete loop to go round, from the battery, through the bulb and back… 28 Electricity and safety 16 sentences · Electricity flows wherever it finds a path to somewhere with a different push, such as the ground, and a hum… 29 Magnets: pulling and pushing without touching 14 sentences · A magnet can pull a paper clip across the table without touching it, through an invisible region around it c… 30 Compasses and the magnetic Earth 17 sentences · The whole Earth behaves like a giant magnet, and a compass needle is simply a little magnet free to turn, so… 31 Energy: what makes things happen 18 sentences · Energy is what lets things move, heat up, light up or change; you cannot see it, but you can see what it does. 32 Fuels, the Sun and saving energy 18 sentences · A log on a campfire holds energy the tree caught from sunlight; burning joins the wood with oxygen from the… 33 Levers: lifting heavy things with a little push 15 sentences · A lever is a stiff bar that turns round a fixed point called a pivot, and it lets a small push do a big job. 34 Wheels, axles, ramps and screws 15 sentences · Try turning the thin metal bar inside a door when the handle has come off: it is really hard, yet with the h… 35 Pulleys, gears and big machines 16 sentences · At school assembly someone pulls the flagpole rope down and the flag climbs up: a single wheel at the top, a… 36 Speed: fast and slow 17 sentences · Speed is how far you go in a certain time: when the car's speedometer shows 50, the car would cover 50 kilom… 37 Seat belts, crashes and keeping safe 15 sentences · In a crash the car stops in a moment, but everything inside it, you, your bag and the dog, keeps moving forw… 38 Rockets, record speeds and motion everywhere 16 sentences · You can feel the same push back when a garden hose wriggles as the water rushes out, and a squid uses it to… 39 Day and night, and the Moon's faces 17 sentences · The Sun seems to climb up in the east and sink in the west, but it is really the Earth spinning towards the… 40 Seasons and tides 17 sentences · The Earth is tilted, so as it travels round the Sun each year, first one half and then the other leans towar… 41 Alice's fall and her sizes: falling, the centre of the Earth, giants and tiny people 18 sentences · Alice falls down the rabbit hole so slowly that she takes a jar of orange marmalade off a shelf on the way a… 42 Olympiad: forces, floating and machines ★★★ 17 sentences · This olympiad block closes the course: each puzzle hides one sharp idea from the earlier lessons, and the tr… 43 Olympiad: sound, light, heat, electricity and magnets ★★★ 18 sentences · This block mixes the wobbles, rays and flows of the course, sound, light, heat, electricity and magnets, int… 44 Olympiad: speed, space and seasons ★★★ 18 sentences · The last olympiad lesson goes fastest and furthest: speeds, rockets, the spinning Earth, the Moon, tides and… ← previous Mythsnext → Politics↑ back to the school This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/school/physics/