Layers of Earth

3. the emission of energy in the form of ionizing radiation
5. the region surrounding the earth or another astronomical body in which its magnetic field is the predominant effective magnetic field
6. the energy stored in an object as the result of its vertical position or height
10. the lightest, most buoyant rock layer
13. a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials
14. the force that attracts a body toward the center of the earth, or toward any other physical body having mass
16. is mostly composed of liquid iron and nickel
17. energy that comes from a source and travels through space at the speed of light
18. the innermost geologic layer of planet Earth
19. the relatively thick part of the earth's crust that forms the large landmasses

1. the rigid outer part of the earth, consisting of the crust and upper mantle
2. radiant energy emitted by the sun
4. the uppermost layer of the oceanic portion of the tectonic plates
7. the upper layer of the earth's mantle in which there is relatively low resistance to plastic flow
8. is mostly solid, but its more malleable regions contribute to tectonic activity
9. the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise
11. difference in height from the surrounding terrain; the amount of variation in elevation and slope in a particular area
12. the process by which heat or electricity is directly transmitted through a substance when there is a difference in temperature
13. the region of the earth's interior between the crust and the core, believed to consist of hot, dense silicate rocks
15. the third layer of the atmosphere, directly above the stratosphere and directly below the thermosphere