Earth's Layers and Plate Tectonics
Across
- 2. The outermost solid layer of Earth
- 3. Tugs plates along as the dense edge of a plate sinks beneath Earth's surface
- 6. Two plates collide
- 10. The process that explains the age and magnetic patterns of sea-floor rocks
- 13. Extends from below the mantle to the center of Earth, the densest layer and makes up 1/3 of Earth's mass.
- 15. Moves plates away from mid-ocean ridges as rock cools and becomes more dense
- 16. The strong, lower part of the mantle whose rock flows more slowly than the asthenosphere.
- 17. Convection What drags plates along as mantle material moves beneath tectonic plates
Down
- 1. The lithosphere is divided up into these pieces
- 4. The liquid layer of Earth's core which lies beneath the mantle and surrounds the inner core.
- 5. Two plates move away from each other
- 6. The movement of matter that results from differences in density caused by variations in temperature.
- 7. Two plates move past each other horizontally
- 8. The layer of weak or soft mantle that is made of rock that flows slowly. Tectonic plates move on top of this layer.
- 9. The solid, dense center of our planet that extends from the bottom of the outer core to the center of Earth. Specifically, it is about 6,380 km beneath the surface.
- 11. The outermost, rigid layer of Earth that is made of the crust and the rigid, upper part of the mantle. It is divided into pieces called tectonic plates.
- 12. The large-scale movements of Earth's lithosphere which is made up of the crust and the rigid, upper part of mantle
- 14. Continents that joined in a single large landmass
- 16. Located between the Core and the crust. It is a region of hot, slow-flowing, solid rock.