Question

Which is an example of physical weathering?(1 point)
Responses

a crack in rock growing larger as water freezes in it
a crack in rock growing larger as water freezes in it

lichen releasing a weak acid that dissolves rock
lichen releasing a weak acid that dissolves rock

microscopic organisms producing compounds that break down rock
microscopic organisms producing compounds that break down rock

bits of iron in rock rusting when exposed to oxygen and water

Answer 1

The correct example of physical weathering is:

**a crack in rock growing larger as water freezes in it.**

This process, known as freeze-thaw weathering, occurs when water seeps into cracks in rocks, freezes, expands, and causes the cracks to grow larger.