Noor's crossword

3. the middle part of the earth
6. an area where one tectonic plate is forced downward
7. a volcano that has not erupted for at least 10,000 years, but scientists think it may erupt again
10. a large natural elevation of the earth's surface
11. a theory that the contents were attached together in the past, and have been falling apart ever since
13. the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection in thought to occur
14. a boundaries between tectonic plates that are moving towards each other
15. part of the earth between the core and the the crust
16. no longer in existence
18. outer layer of the Earth
19. a sudden shaking of the ground

1. a scientist who uses fossil evidence to study life in prehistoric times
2. a boundary between tectonic plates that are moving away from each other
4. the plates sliding sideways past each other
5. volcano built up of ash or lava
8. outer part of the earth
9. periods of thousands, millions, and billions, of years referred other scientists who study the earths history
12. a single landmass
13. a volcano that is erupting
17. the size of a diagram or model in proportion to the actual size of a object