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Questions and Answers
The Earth has 4 distinct ___________: crust, mantle, outer core, and inner core.
The Earth has 4 distinct ___________: crust, mantle, outer core, and inner core.
layers
The thickness of the crust ranges from 5 km to __________ km.
The thickness of the crust ranges from 5 km to __________ km.
100
The outer mantle is __________, while the lower mantle is somewhat "plastic" and easily deformed.
The outer mantle is __________, while the lower mantle is somewhat "plastic" and easily deformed.
solid
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Study Notes
- Earth has 4 distinct layers: crust, mantle, outer core, and inner core.
- The crust is the outermost layer and is broken up into tectonic plates.
- The thickness of the crust ranges from 5 km to 100 km.
- The mantle makes up 80% of the Earth's mass and is composed of ferro-magnesium silicate rocks.
- The outer mantle is solid, while the lower mantle is somewhat "plastic" and easily deformed.
- The core has two layers: the liquid outer core made of molten nickel and iron, and the solid inner core made of iron.
- The inner core gives the planet its magnetic features.
- The crust is divided into continental and oceanic crust, with different compositions and ages.
- The asthenosphere is a layer in the upper mantle where convection of molten rock occurs.
- The temperature of the Earth's layers increases as you go deeper into the planet.
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