Unit 3 Review

5. -Plastic solid layer under the lithosphere, convection currents located here
7. - ________ currents are what move continents
8. - Wegener used ________ climate data to show that continents have moved
9. - _________ Spreading Theory provided an explanation for how continents move.
11. - Earth's crust and top, solid portion of the mantle
16. - Layers of Earth that are determined by what they are made of
18. - When something is more dense it will _______.
19. - These seismic waves cannot travel through the liquid outer core

1. - Wegener noticed that continents fit together like a _____ puzzle
2. Core - Layer of Earth that is under the most pressure, made of solid iron and nickel
3. - _________ zones are areas seismic waves cannot reach
4. Layers of Earth that are determined by their physical properties
6. - Earth's layers separate because of differences in _______.
8. - Earth's surface, thinnest layer of Earth (Compositional)
10. - solid layer of Earth below the asthenosphere
11. - When a substance is heated, it becomes _____ dense and rises.
12. - These seismic waves travel through all layers of Earth
13. - ___ sequence refers to the order and age of rocks on far apart continents
14. Core - Layer that makes Earth's magnetic field, is a liquid
15. - Wegener found ___________ of the same species on continents that were separated by oceans
17. - Thickest layer of Earth, is a plastic solid (Compositional)