Across
- 3. Semi-solid layer between the crust and core.
- 5. One plate moves under another; volcanoes are common here.
- 6. A place where two tectonic plates move towards each other and collide
- 7. Thinnest type of crust.
- 9. Layer under the mantle. Formed of liquid iron and nickel.
- 12. Thickest type of crust; makes up the continents
- 14. The boundary between two tectonic plates moving away from each other, creating rift valleys on land, new ocean crusts on sea floors, and mountainous ridges
- 15. The outermost part of the Earth, comprising the crust and the uppermost part of the mantle
- 16. Outermost layer of the earth. The continents are found here.
- 17. A place where two tectonic plates slide past each other
Down
- 1. The place where two different plates make contact
- 2. The theory that the lithosphere is divided into tectonic plates that slowly move on top of the asthenosphere
- 4. The solid layer with plasticity in the upper mantle that is located just below the the lithosphere; lithospheric plates "float" and move on this layer
- 8. Innermost layer of the Earth; solid iron and nickel.
- 10. The crust at the bottom of a sea or ocean
- 11. Technique used to determine how old a rock is by analyzing the amounts of a radioactive isotope and its decay products in the rock
- 13. Heated mantle material is shown rising from deep inside the mantle, while cooler mantle material sinks