The crust of the Earth is the first layer you come to. This is the layer that is visible for all humans on Earth. It is the thinnest layer of the Earth. The crust is comparable to the skin of an apple. It is made up of two different layers. The oceanic crust is only about 3-5 miles thick. The continental crust is about 25 miles thick. The crust can range in temperature from the air temperature you feel to 1,600 degrees Fahrenheit. To put this into perspective, bread is baked at 350 degrees Fahrenheit. So, at 1,600 degrees Fahrenheit rocks begin to melt. Now that's hot!
As you being to explore the Crust's layer you begin to realize that there are rocks here! You look around, and notice that some rocks look the same, while others look different. There are three different types of rocks that are present on the Crust of the Earth; sedimentary rocks, metamorphic rocks, and igneous rocks. Remember it is your job to explore the rocks at each layer, and record what you find!
Vocabulary Helper: -Crust: A layer from 3-25 miles thick consisting of sand and rock -Fahrenheit: A temperature scale -Comparable: able to be likened to another -Oceanic: of or relating to the ocean, in this sense under the ocean -Continental: forming or belonging to a continent, in this sense under the continents