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
Middle School Earth Science
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
Rock and Mineral Classification (AI Image Analysis)
Notes This program is a rock and mineral classification program utilizing artificial intelligence image analysis. When you take a photo of a rock on-site with a camera, the AI analyzes the image and identifies the types … more
Solar wind and the aurora
Solar wind The Sun emits electrically charged particles. Because the Sun is mostly hydrogen, these particles are mainly protons and electrons. They travel through space at hundreds of kilometers per second. When solar activity increases, the … more
Solar System
Solar System All the orb bodies that revolve around the sun and their space are called the solar system. The celestial bodies that make up the solar system include the eight planets revolving around the sun … more
Mercury Barometers on Different Planets
What would happen if you brought a mercury barometer to Earth, the Moon, Mercury, Venus, and Mars? Here, we assume that the mercury barometer has a U-shaped tube: one side is open, and the other side … more
Density distribution in the atmosphere
Observe how the density distribution of the atmosphere changes as gravity (gravitational acceleration) is varied. The total kinetic energy of the air particles is assumed to be constant. Gravity is assumed to act uniformly, and no … more
Why the Universe Looks Dark (The Expansion of the Universe)
Why does the night sky look dark? It’s dark at night. This seems obvious, but you’ll find something strange if you think about it a little. Shouldn’t the universe be bright if the night sky is … more
Day and Night, Seasons, White Night, Polar Night
* If you are asked to access your location, please allow it. * Your personal data is not stored on the server. * For iOS devices, please allow location access as follows. Day and night The … more