Across
- 3. 5 to 70 km thick; also known as the surface; where we live
- 6. Brittle upper part of crust; contains most of Earth's rocks, feeds plants
- 7. Entirely iron; 5200°C; pressurized into a solid
- 8. 40km thick; makes up the continents; 200-400°C
- 9. 2200km thick; iron and nickel; flows as a liquid; Earth's magnetic field
Down
- 1. Magnesium, iron, silicon; moves heat from the core to planet
- 2. Causes continental drift; Earth is the only planet with one
- 4. 500-900°C; drives plate tectonics
- 5. Volcanic and igneous rock; made of melted mantle, hydrothermal current