What lies beneath the ocean? What's at the bottom of the deep blue sea? Tall mountains! Great plains! Deep valleys! Volcanoes! The whole outside of the earth is covered with a rocky crust. The...
The moving continents
It may seem to you that the earth's crust is a single piece of rock. You may think this crust covers the outside of the earth just as an apple's skin covers an apple. But the earth's crust is...
The outside of the earth
We live on the surface of the earth. The surface, or crust of the earth, is made of rock. In some places, it is covered with soil. In many places, it is covered with water. All around it is air. ...
What’s inside the earth?
Could you dig a hole to the other side of the earth? No, you couldn't. The center of the earth is about 4,000 miles (6,400 kilometers) beneath your feet. So, it's almost 8,000 miles (13,000...