Convex Mirror & Concave Mirror
Real image and virtual image Looking at an object, we feel there is an object in it. By the way, if you feel that there is something, we say there is an ‘image’, even if there … more
Convex Lens & Concave Lens
Real image and virtual image Looking at an object, we feel there is an object in it. By the way, if you feel that there is something, we say there is an ‘image,’ even if there … more
Movement of Ion particles
* You can move ion particles with the mouse. Movement of Ion particles Ions acquire electric charge by gaining or losing valence electrons, depending on the type of atom. Electric forces act between charged substances. A … more
Try assembling an atom
Freely combine protons, neutrons, and electrons to create your own atom. Notes This simulation only provides tools for building atomic models and does not determine whether the completed atomic model is stable. For every number of … more
Element Symbol Typing Bubble Game (Scoreboard) – Fixed incorrect language code
This page is the start screen for the Element Symbol Typing Bubble Game. When a teacher creates a game, a QR code for joining and a live scoreboard will be displayed on the screen. Students can … more
Magnetic Field around Magnet(or Earth)
Magnetic field around magnet The space where the magnetic force of the magnet acts is called a ‘magnetic field.’ The direction of the magnetic field is determined in the direction indicated by the N pole of … more
Density Tower 2 (Comparison of densities of various liquids, plastic, iron, and gold)
Density Tower A density tower is made by stacking several liquids in one container according to differences in density (mass per unit volume). Liquids with higher density sink to the bottom, while liquids with lower density … more
Plate Tectonics
Notes Loading the Earth map data uses approximately 6MB of data. Users who are sensitive to mobile data usage should consider this before accessing the page. Plate Tectonics Plate tectonics is the theory that Earth’s surface … more
Density Tower (Comparison of densities of various liquids, plastic, iron, and gold)
Density Tower A density tower is made by stacking several liquids in one container according to differences in density (mass per unit volume). Liquids with higher density sink to the bottom, while liquids with lower density … more
Recrystallization (Principle of precipitation)
Lower the temperature to precipitate some of the substances as a solid, then filter them through filter paper. Recrystallization Recrystallization is a method of separating and purifying a substance by using the property that the amount … more
Putting together continental fragments using fossil tracks
🟤 Cynognathus 🟢 Glossopteris 🟠 Lystrosaurus 🟣 Mesosaurus Move the continents so that the fossil distributions connect into one continuous pattern. Can all the continents be joined together into a single landmass? Distribution of Fossils The … more
Seismic wave observation and the discovery of the outer core
Seismic Wave Observations and the Discovery of the Outer Core The process by which Earth’s internal structure—especially the existence of the outer core—was revealed through seismic wave observations is a major discovery in Earth science. When … more