Day 238~366

The first layer of the earth’s crust, consists of about 10 miles of rock and loose materials. Underneath the continents, the crust is almost three times as thick as it is under the oceans. The ingredients used to make the Earth’s crust are complex. The basic ingredients are known as elements. There are 90 known elements that exist in the Earth’s crust. These elements combine with one another in a number of natural ways, creating molecules known as minerals. There are around 3,700 known minerals found in the Earth’s crust, with dozens of new minerals being discovered each and every…