Earths Interior

What are the features of Earth’s Crust, Mantle and Core?

The crust is the layer of rock that forms Earth's outer surface. The crust is a layer of solid rock that includes both dry land and the ocean floor. The main elements in the crust are oxygen and silicon. Basalt is a dark, fine-grained rock. Granite is a rock that usually is a light color and has coarse grains

The mantle is made up of rock that is very hot, but solid. Scientists divide the mantle into layers based on the physical characteristics of those layers. Overall, the mantle is nearly 3,000 kilometers thick. Geologists often group the crust and uppermost mantle into a single layer called the lithosphere. The soft layer on which the lithosphere floats is called the asthenosphere.

The core is made is made mostly of the metals iron and nickel. It consists of two parts- a liquid outer core and a solid inner core. The outer core is a layer of molten metal surrounding the inner core. Despite enormous pressure, the outer core is liquid. The inner core is a dense ball of solid metal.

How do Geeologists learn about Earth's interior?

It is very difficult answer because, geologists are unable to see deep inside Earth. Geologists have used two main types of evidence to learn about Earth's interior: direct evidence from rock samples and indirect evidence from seismic waves.

What are some important vocabulary terms you should know?

Seismic Waves: Vibrations that travel through Earth carrying the energy released during an earthquake.

Pressure: The force pressing on an area.

The other vocab words have already been explained to you in this flyer. you can find them in the previous questions. I hope I helped you get to know more about the Earth's interior!