Question

The .........in the rocks expand because of heat and contract when temperature decreases​

Answer 1

Answer:

Temperature changes can also contribute to mechanical weathering in a process called thermal stress. Changes in temperature cause rock to expand (with heat) and contract (with cold). As this happens over and over again, the structure of the rock weakens. Over time, it crumbles.

Explanation:

Temperature is the answer

Answer 2

Answer:

TEMPERATURE is your answer