The Child Advocacy Center is a safe, child friendly location for children to come speak with trained interviewers or one of our medical providers. We know this can be an anxious time for you and your family. When we are able, one of our child advocates will be calling you before the interview or medical evaluation to answer any of your questions.
The thickest parts are under the continents and the thinnest parts are under the oceans. Crust. Earth's crust is made up of several elements: oxygen, 47 percent; silicon, 27 percent; aluminum, 8 percent; iron, 5 percent; calcium, 4 percent; magnesium, potassium and sodium, 2 percent. The crust is divided into huge plates that float on the mantle, the next layer.
We are all made of. stardust. There are many different types of atoms. You probably can name many of them already, such as oxygen, calcium, carbon and iron. We call them elements. And everything on this planet is made up of various combinations of these elements. Including you.