What is the process by which the layers of a glacier flow at different speeds without breaking?
a. pyroclastic flow
b. basal sliding
c. ogive sliding
d. plastic flow

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

Select the star life cycle that is accurate

When a rock is mechanically weathered, the surface area of the rock is increased, which allows a greater amount of chemical weathering to occur. the surface area of the rock is increased, which hinders chemical weathering. the volume of the rock is decreased, which hinders chemical weathering. the volume of the rock is increased, which allows a greater amount of chemical weathering to occur. the surface area of the rock is decreased, which allows a greater amount of chemical weathering to occur