Unit 3 Lesson 1 Review

5. early earth can be describe as being like this
7. this wave can travel through any layer of earth
10. this piece of evidence is equal to 5.5g/cm
12. what something is made of
13. this layer is made of nickel and iron
17. this piece of evidence occurs when rocky, metallic bodies crash onto earth's surface
18. this is the force that caused earth to be layered
20. this is the densest, hottest, and most pressurized layer

1. this is made when seismic waves are not detected on seismographs due to changes in the layer's physical properties
2. this type of crust is thick but less dense and is made of granite
3. this is the process by which earth became layered as it cooled down
4. this is the least dense physical layer
6. this is a piece of evidence for earth's interior; is made when volcanoes erupt rock from deep within earth
8. this is made when the liquid outer core moves around the solid inner core
9. this layer is divided into chunks called tectonic plates
11. this wave cannot travel through the outer core
14. this source of heat still occurs today inside of earth's core
15. this layer is made of silicates
16. this is a flexible, but solid layer of earth; physical layer
19. these are waves of energy that travel through earth that provide evidence of earth's interior
21. this type of crust is made of basalt and is very dense