Question

thickness (km) density (g/cm³) top bottom types of rock found crust 30 2.2 2.9 silicic rocks upper mantle 720 3.4 4.4 peridotite lower mantle 2,171 4.4 5.6 magnesium and silicon oxides outer core 2,259 9.9 12.2 iron+oxygen inner core 1,221 12.8 13.1 iron+oxygen which conclusion is supported by information in the table? the mantle is thinner than the crust. the core is the thickest of earths layers. the inner core is thicker than the outer core. the mantle is the thinnest of earths layers.

Explanation:

1. Calculate total thickness of each layer:

• Crust: 30 km
• Mantle: $720 + 2171 = 2891$ km
• Core: $2259 + 1221 = 3480$ km

1. Compare values: 3480 km (core) > 2891 km (mantle) > 30 km (crust). This confirms the core is the thickest layer, and eliminates the other incorrect options.

Answer:

B. The core is the thickest of Earth's layers.