Layers of the earth

2. a mineral that the body needs for growth and development
4. The planet in which we live on
6. directly above the stratosphere and below the thermosphere
8. the mass of an object compared to the size or volume of that object
11. the outermost shell of a terrestrial planet
12. the state or quality of being thick
13. consists of a solid iron-nickel ball rotating within a layer of liquid metal
14. the amount of force that is being exerted
15. the upper layer of the earth's mantle, below the lithosphere
16. is made up of 44.8% oxygen, 21.5% silicon, and 22.8% magnesium
19. The innermost part of Earth
20. the measurement of the amount of heat in an object

1. the uppermost layer of the oceanic portion of the tectonic plates
3. mostly composed of liquid iron and nickel
5. the large sections of Earth’s crust which move around on theLithosphere.
7. waves an elastic wave in the earth produced by an earthquake or other means
9. made up of the parts of Earth where life exists—all ecosystems
10. the rigid outer part of the earth, consisting of the crust and upper mantle
17. a chemical element with symbol Ni and atomic number 28
18. a sheet, quantity, or thickness of material, typically one of several, covering a surface or body