- Creation Date: September 28, 2012
- Academic Subject:
This video will take the students on a journey through the various layers of the Earth. We will start explaining that Earth is divided into different layers (with a comparison with different layers of a cake) and how geologists can “see” the inside of the Earth (volcanoes and earthquakes).
Then our fun journey will begin and we will enter in a kind of vehicle to explore the different layers (from the surface to the center of the Earth). We will start with the lithosphere and compare it with the shell of a hard-boiled egg (both are ~2% of Earth and an egg respectively). We will show that lithosphere is made up of two different layers: crust and a tiny bit of the upper mantle. Then we will explore mantle and its sub-layers: upper and lower mantle. We will also talk about the portion of the mantle known as asthenosphere, where the lithosphere rides on top. The properties of this layer will be shown using a visco-elastic material. The trip continues beneath the mantle, where we can find the center of the Earth: the core. We will explain the core is further divided into an inner core and an outer core. While we are talking about each layer, we will give some important details such as the thickness, the composition, etc. To make it easier to visualize the different layers. we will compare them with real life examples (as we did with the egg’s shell).