Earth Science Layers of the Earth. The Earth’s Layers Layers.
UNIT 6 The Earth’s structure Natural Science 2. Secondary Education THE LAYERS OF THE GEOSPHERE.
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Transcript of UNIT 6 The Earth’s structure Natural Science 2. Secondary Education THE LAYERS OF THE GEOSPHERE.
UNIT
6The Earth’s structure
Natural Science 2. Secondary Education
THE LAYERS OF THE GEOSPHERE
UNIT
6The layers of the geosphere
Crust
Mantle
Core
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Natural Science 2. Secondary Education
• This is the outer layer of the geosphere.
• It is very thin compared with the mantle and core.
• It is made up of hard, solid rocks.
• There are two zones:
The crust
The continental crust: this forms the continents and the continental platforms.
The oceanic crust: this is found on the ocean floor. It is thinner and denser than the continental crust.
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UNIT
6The layers of the geosphere
Natural Science 2. Secondary Education
• This is the middle layer of the geosphere; it is also the thickest.
• It is made up of denser rocks than those of the crust. Most of them are solid.
• The rocks in the upper part are hard, but most of the rocks of the mantle are relatively soft (malleable), and in some zones they can be molten.
The mantle
Mantle
Hard mantle
Soft mantle
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UNIT
6
Natural Science 2. Secondary Education
The layers of the geosphere
• This is the innermost layer of the Earth. It is also the densest.
• It is made up of metals.
• There are two parts:
• The outer core, which is molten metal.
• The inner core, which is solid.
The core
Core
Outer core
Inner core
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UNIT
6The layers of the geosphere
Natural Science 2. Secondary Education