Forces

2. boundary where tectonic plates slide past each other usually cause earthquakes
4. boundaries tectonic plates move towards each other usually forming mountains and volcanoes
8. A group of the same species living in the same area
10. Rock formed when lava or magma cools and hardens
12. formed at plate boundaries usually when plates collide
14. formed as a result of high temperature and pressure deep within earth changing a rock alredy existed
15. includes the crust and upper part of the mantles and is divided into tectonic plates
19. sudden events that led to a mass extinction
21. An opening in the Earth's crust through which molten rock is pushed out and creates new rock

1. new oceanic crust is formed as tectonic plates pull apart and magma rises
3. instruments used to measure and record seismic waves
5. Extinction events that occur over a longer time period
6. plates Large rigid pieces of the Earth's lithosphere that move and interact with each other and pate boundaries
7. name of an ancient supercontinent when it was all one landmass
9. The semi fluid layer of the mantle where convections currents happen
11. located between the mantle and the outer core
13. hot material rises cooler materials sink it drives plate tectonics
16. boundaries tectonic plates move away from each other usually form new crust and rift valleys
17. Fractures or zones of weakness in the Earths crust
18. deep elongated depressions in the ocean often associated with subduction zones
20. Forms after a weathering and erosion when sediments compact and sediment