Key Information
Inside our Planet
| Type | The internal structure of our planet |
Learning Point
- Inside our Earth crust lies a layered interior driven by intense heat and pressure. The mantle, a thick layer of semi-solid rock, moves in slow convection currents that shift tectonic plates. Deeper still is the outer core, a sea of liquid iron and nickel that generates our planet’s magnetic field. At the very center sits the inner core, a solid metal ball as hot as the Sun’s surface, kept solid by crushing gravity. This internal engine fuels everything from volcanic eruptions to earthquakes, constantly reshaping the world we see on the surface.
Project
- Draw a diagram of our planet Earth.
- Overview
Science Week – 2026
Fun Facts
- Earth has layers just like an onion! We live on the outside “skin” called the crust, which is actually the thinnest layer of all.
- The very middle of the Earth (the inner core) is a solid metal ball that is about as hot as the surface of the Sun!
- The ground beneath your feet isn’t perfectly still. The crust is broken into giant puzzle pieces called tectonic plates that float on a hot, gooey layer of rock called the mantle.
- The Earth’s outer core is made of liquid iron that flows around like a river. This movement creates a giant magnetic field that acts like an invisible shield, protecting us from space radiation.
- All the sparkly diamonds in jewelry were actually made deep inside the Earth’s mantle, where the heat and pressure are so strong they squeeze carbon into crystals.
- Humans have never even come close to the center! The deepest hole ever dug is the Kola Superdeep Borehole, and it only went about 7.5 miles deep—that’s not even through the very first layer!
Past Lessons
| 187 | February 16, 2026 | (North America) |