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Earth Structure: Layers and Composition
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Earth Structure: Layers and Composition

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Questions and Answers

The Earth's outermost layer is known as the ______.

crust

The two types of crust are continental crust and ______ crust.

oceanic

The mantle is made of molten iron and ______ that will still flow under pressure.

minerals

The asthenosphere helps with the movement of tectonic plates and acts as a ______ layer.

<p>lubricating</p> Signup and view all the answers

The outer core is composed of liquid iron and ______.

<p>nickel</p> Signup and view all the answers

Scientists learn about Earth's interior through methods like seismic waves, drilling, and ______

<p>computer simulations</p> Signup and view all the answers

Seismic waves, created by earthquakes or artificially, give us valuable information about the composition and density of Earth's ______

<p>layers</p> Signup and view all the answers

The theory of continental drift is most associated with the scientist ______

<p>ALFRED WEGENER</p> Signup and view all the answers

Wegener published a paper explaining his theory that the continental landmasses were 'drifting' across the Earth, sometimes plowing through oceans and into each other. He called this movement continental ______

<p>drift</p> Signup and view all the answers

Plate tectonics is a scientific theory that explains how major land forms are created as a result of Earth’s ______ movements

<p>subterranean</p> Signup and view all the answers

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