Question

Weathering can change the physical characteristics of an area. Which statement is an example of chemical weathering?

Freezing and thawing of water expand cracks in rock.
Plant roots growing into cracks in rock force the rock to break.
Rain mixes with pollutants in the air to interact with rock.
Glaciers grind away rock as they pass over it.

Answer 1

"Rain mixes with pollutants in the air to interact with rock" is an example of chemical weathering

Step-by-step explanation:

The first statement refers to something known as "freeze thaw" which is mechanical weathering.

The second and fourth statements also refer to mechanical weathering