00:01
So our three major layers of earth are going to be as listed from top to bottom, our crust, our mantle, and our core.
00:14
So i'll try and draw a little diagram out here also on the left -hand side, kind of showing each of those relative sizes.
00:24
So again, on the top is going to be our first most layer, and this relatively thinnest, of our three layers is our crust.
00:38
And again, that crust is that top layer composed of rock material.
00:44
And definitely the thinnest of the three averaging only usually about 25 or so miles on average in its thickness, about 40 kilometers in its thickness and average.
00:59
The middle layer then is going to be our mantle.
01:10
And so the mantle is also composed of various rock compounds, although it does have some heavy metals to it...