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Layers of the Earth

Across
The thin outer layer; the part we walk on.
Animal that digs the deepest burrows.
The thickest layer.
The center of the earth is about 4000 ______ from the crust.
The solid center layer.
Elements in the mantle that produce heat are _________.
What part of the core is made up of super hot liquid metal?
The core is made up of nickel and ________.
The kind of waves geologists use to find what lies beneath Earth's surface.
The mantle is made up of what kind of rock?
Down
The deepest point in the ocean is the Mariana _____.
Heat causing rocks in the mantle to rise and fall.
Permanently frozen soil layers.
The earth owes its _______ field to the outer core.
The deepest cave is found in which country?
The oldest rock in the crust is about 4 _______ years old.
What precious stones were made in the mantle a billion years ago?
The crust is made up of the continental crust and the _____ crust.
Even though it's made up of basically solid rock the mantle is constantly ____.
The mantle is made up mostly of ______.
Animals that spend every winter in a New York zinc mine.