Results for “class 10 science”

…First, three honest points There are far more than two careers in science. Engineering and medicine are the famous ones, but research, data science, agriculture, forestry, environment,…

…the sex of her child has caused real harm to real families, and the science answers it plainly. Which parent’s gamete determines the sex of a human child? All eggs carry X; sperm carry…

Physics · Class 10 · Electricity: Ohm’s law and resistance Plot a straight-line V–I graph and obtain a resistance of 5 Ω . Every appliance rating, every fuse and every wire thickness in…

…investigate. Study: Physics / Astrophysics / Earth or Planetary Science; strong Maths. Software & Data Writes the code that flies spacecraft and turns satellite data into useful answers.…

Part 2 — Chemistry Part 1 — Physics Experiments 1–5 · floating and sinking, light and shadows, magnets, circuits, forces and friction Experiments 6–8 · solutions, evaporation and the water…

Physics · Classes 4–5 · Materials around us: floating and sinking Make the lump of clay float on water. (Clay sinks — so you will have to think!) Ships made of thousands of tonnes of steel…

Physics · Classes 4–5 · Light travels in straight lines; opaque, translucent, transparent Make the shadow exactly twice as tall as the toy (a 20 cm shadow from a 10 cm toy). Your shadow is…

Part 1 — Physics Experiments 1–8 · motion graphs, equations of motion, Newton’s laws, momentum, gravitation and free fall, density and buoyancy, work and energy, sound and echoes…

Physics · Class 9 · Motion: distance–time and velocity–time graphs Produce a velocity–time graph that is a straight sloping line and read an acceleration of 2 m/s² from it. A speedometer…

Physics · Class 9 · Equations of motion applied to braking Bring the car to a stop within the 40 m before the cow on the road. This is the arithmetic behind every speed limit sign, and why…

Part 1 — Physics Experiments 1–7 · force and pressure, pressure in liquids, friction, sound, static electricity and lightning, multiple reflection, chemical effects of current Experiments…

Physics · Class 8 · Force and pressure: pressure = force ÷ area Rest the 5 kg weight on the balloon without bursting it (keep the pressure below 50 kPa). A camel’s broad feet stop it…

Physics · Class 8 · Pressure in liquids and the atmosphere Make the water jet land at least 40 cm from the bottle. A village overhead tank is built high so that taps below have good…

Physics · Class 8 · Friction: static, sliding and rolling Move the box using a pull of less than 5 newtons . Ball bearings in a cycle hub, oil in an engine, and the treads on a tyre are all…

Physics · Class 8 · Sound: vibration, frequency, amplitude and medium Produce a high-pitched, loud sound that the microphone can hear (above 400 Hz). A tabla tightened with its straps rises…

Physics · Class 8 · Some natural phenomena: static electricity and lightning Make the leaves of the electroscope spread apart . Your comb picks up paper bits on a dry day, a woollen sweater…

Physics · Class 8 · Light: multiple reflection and lateral inversion Arrange two mirrors so that you see exactly five images of the object. A kaleidoscope, a barber’s two facing mirrors and…

Physics / Chemistry · Class 8 · Chemical effects of electric current Coat the steel spoon with a smooth, even layer of copper . Ornaments are gold-plated, cycle handlebars and taps are…

Chemistry · Class 8 · Combustion and flame Put the candle flame out by removing one condition needed for burning. A fire extinguisher, a pan lid over a kitchen fire, and sand thrown on…

Chemistry · Class 8 · Materials: metals and non-metals Identify the mystery sample (it is sulphur ) using the right tests. Electricians choose copper for wires and PVC for insulation, cooks…

Chemistry · Class 8 · Displacement reactions and the reactivity series Get a reddish-brown copper coating on the metal strip. This reaction is used to extract metals from their compounds,…

Chemistry · Class 8 · Synthetic fibres and plastics Choose the best fabric for a raincoat — and test it properly before deciding. Cotton kurtas for a Chennai summer, nylon for a raincoat,…

Chemistry · Class 8 · Coal and petroleum: fractional distillation Collect the petrol fraction cleanly (it boils between about 70 °C and 120 °C). Every litre of petrol, diesel, kerosene and…

Chemistry · Class 8 · Pollution of air and water; purification Turn the muddy pond water into water that is safe to drink . This is exactly what a municipal waterworks does for a city, and…

Biology · Class 8 · Cell structure and functions Assemble a plant cell with all its correct parts. Every living thing you have ever eaten, petted or been is built of cells. A hen’s egg is a…

Biology · Class 8 · Microorganisms: friend and foe Inflate the balloon on the bottle using yeast. This is how every bhatura, dosa batter, idli and loaf of bread rises, and how curd sets…

Biology · Class 8 · Crop production and management Get the highest yield you can without damaging the soil . Every decision here is one an Indian farmer makes each season, and the Green…

Biology · Class 8 · Conservation of plants and animals Find out what happens to a whole forest when one species disappears. Vultures nearly vanished from India in the 1990s, and rotting…

Biology · Class 8 · Reproduction in animals; metamorphosis Put the four stages of the frog life cycle in the correct order. A silkworm’s metamorphosis gives us silk; a mosquito’s means that…

Part 2 — Chemistry Part 1 — Physics Experiments 1–6 · measurement, speed, the pendulum, reflection of light, heat and conduction, electromagnets Experiments 7–10 · acids, bases and…