The Composition of the Earth
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- The Earth is almost 4.5 billion years old.
- The Earth’s layers were also formed when the Earth was formed
- The crust ranges from 200° Celsius (392° Fahrenheit) to 400° Celsius (752° Fahrenheit). The mantle extends from 35-2980 kilometers below Earth's surface. The innermost part of Earth is the Inner core. Earth's outer core is a fluid layer about 2,400 km thick and composed of mostly iron and nickel
- Air, water, soil, minerals, fuels, plants, and animals.
- Natural resources are resources that exist without any efforts of humankind.
- The evident and catastrophic events caused by this movement are Earthquakes and volcanic eruptions.
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- Processes on Earth create constant change. These include movement in the tectonic plates in the crust, wind and water erosion, and deposition.
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