Question

Choose one:

A. Weathering happens fastest on the flat faces of broken blocks of rock.
B. When rocks in an outcrop undergo weathering at different rates, it is called differential weathering.
C. Physical weathering speeds up chemical weathering, by weakening the rock.
D. Chemical weathering helps physical weathering by increasing surface area.

Answer 1

Option A

Weathering happens fastest on the flat faces of broken blocks of rock.

Step-by-step explanation:

All the other statements are true but option A is false since generally, the flat surfaces get weathered only from one particular direction, whereas broken rocks can be weathered more easily. Physical weathering increases the surface area of the rock hence speeding chemical weathering. Moreover, chemical weathering facilitates physical weathering of rocks by increasing surface area and all rock outcrops undergo different weathering rates since their surface areas exposed are different.