describes the general process by which rocks are broken down at the carth's surface?
A. Deposition
B. Erosion
C. Metamorphism D. Weathering
19. Which refers to the heat left over from the formation of the Earth?
A Heat from the sun. B. Primordial heat C. Radiogenic heat D. Superheating
20. Which layer of the Earth is made up of liquid Iron and Nickel?
A. Crust
B. Mantle
C. Inner Core
D. Outer Core
21. Where is the mantle found?
A. Between the crust and the core
C. The innermost part of the earth
B. Beneath the tectonic plates
D. The outermost part of the earth
22. In what part of the earth does magmatism happen?
A. Asthenosphere B. Earth's crust C. Earth's core D. Lithosphere
23. What do you call the solidified molten liquid rock?
A. Ash
B. Lava C. Magma
D. Sediments​