Star Student Builder logoStar Student Builder

📚 Encyclopedia

86 entries, written plainly, with a diagram wherever a diagram explains it better than a paragraph.

🌍 Earth science — 8 entries

🌍 Earth science EarthquakesStored strain in rock released suddenly as shaking. The magnitude scale is logarithmic, so each step is far bigger tha… 🌍 Earth science Inside the EarthCrust, mantle, outer core and inner core — worked out almost entirely from the way earthquake waves travel, because no… 🌍 Earth science Plate tectonicsThe Earth's surface is broken into plates that move a few centimetres a year. Everything dramatic in geology happens w… 🌍 Earth science Rocks and mineralsThree families — igneous, sedimentary and metamorphic — and a cycle that turns each into the others given enough time … 🌍 Earth science SoilWeathered rock mixed with decayed life, water and air. It takes centuries to form and can be lost in a season. 🌍 Earth science The atmosphereA thin shell of gas — mostly nitrogen, about a fifth oxygen — in layers, holding in warmth and keeping out the worst o… 🌍 Earth science The water cycleEvaporation, condensation, precipitation, collection — the same water going round, driven by the Sun and gravity. 🌍 Earth science Weather and climateWeather is what the sky is doing today. Climate is what it usually does over decades. Confusing them is the commonest …
Ask GuruAcharya Samayeshwar