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Which of the following is NOT one of the four main layers of the Earth?

• Crust

• Mantle

• Atmosphere

• Inner Core

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Which of the following is considered an endogenous process?

• Erosion

• Weathering

• Tectonism

• Deposition

What is the approximate thickness of the Earth's mantle?

• 6-11 kilometers

• 30-70 kilometers

• 2,900 kilometers

• 5,150-6,370 kilometers

What is the approximate temperature of the Earth's inner core?

• 1,400 Kelvin

• 3,000 Kelvin

• 4,000 Kelvin

• 5,500 Kelvin