A) a process that is only mechanical..
B) the process that breaks rock and other substances down.
C) the movement of rock particles by wind, water, ice, and gravity

A) the process that breaks down rock and other substances at the Earth's surface.
B) the movement of rock particles by wind, water, ice, and gravity.
C) a process that only involves water.

A) Chemical
B) Mechanical
C) Erosion

A) False
B) True

A) False
B) True

A) Acid Rain
B) sand storms
C) Repeated freezing and thawing

A) O, A, B, C
B) A, E, I, O
C) O, A, E, D

A) litter layer
B) humans
C) humus

A) C
B) A
C) B

A) Top Soil
B) Sub Soil
C) Litter layer

A) True
B) False

A) is done on the contours of the landscape
B) is a poor way to conserve soil
C) keeps the dead weeds and stalks from the previous year to return nutrients to the soil

A) It loses fertility
B) It becomes the best soil for planting
C) It is packed with minerals

A) Humus
B) Water
C) Minerals

A) False
B) True

A) convergent boundary.
B) rift valley.
C) transform boundary.

A) primary waves
B) secondary waves
C) Q waves

A) crust, mantle, outer core, inner core
B) outer core, mantle, inner core , crust
C) mantle, core, crust, inner core

A) rock.
B) fire.
C) magma.

A) layer of hot magma.
B) empty.
C) a dense ball of iron and nickel.