The crust and mantle are made of silicate materials, but the crust is less dense and is thinner than the mantle.
Earth is composed of layers, which include the crust, mantle, inner core, and outer core. Each layer has different properties and is composed of different materials. The table shows characteristics of Earth's layers.
Layer Temperature Density Thickness Composition
Crust 200°C – 400°C 2.2 – 2.9 g/cm3 30 km Solid silicate minerals
Mantle 1,000°C – 3,700° C 3.4 – 5.6 g/cm3 2,891 km Molten silicate minerals
Outer core 4,500°C – 5,500°C 9.9 – 12.2 g/cm3 2,259 km Liquid iron and nickel
Inner core 6,000°C 12.8 – 13.1 g/cm3 1,221 km Solid iron and nickel
Use the drop-down menus to complete the statements comparing Earth's layers.
The crust and mantle are made of (Select) materials, but the crust is (Select) dense and is (Select) than the mantle
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