is extremely thin, realtive to the other layers of the Earth.
The exam board does not distingush between the inner and outer core and just uses the term 'Core' to describe both.
All layers of the Earth are solid with the exception of the Outer Core. That said the mantle is mostly solid, but that it is able to move slowly, in the same way that pitch flows over long periods of time.
The Earth is composed of mainly of:
- iron (32.1%),
- oxygen (30.1%),
- silicon (15.1%),
- magnesium (13.9%).
Draw a pie chart to display the Earth's composition data.
The Earth's core is composed of mainly of iron (88.8%) with smaller amounts of nickel (5.8%).
The Earth's crust is composed of mainly of oxygen (47%), chemically locked up in rocks. The most common of which are Silica, Silicon Dioxide (54%) and Alumina, Aluminum oxide (16%).
