Question

what causes sinkholes to form in florida?
a) the bedrock is composed of limestone, which is easily dissolved in slightly acidic water.
b) steep slopes are easily eroded by mass wasting, causing land to shift.
c) melting glaciers that were formed during the ice age caused great amounts of outwash.
d) climate change caused the evaporation of freshwater lakes, leaving large, empty holes.

Explanation:

To determine the cause of sinkholes in Florida, we analyze each option:

• Option A: Florida's bedrock is limestone, which dissolves in slightly acidic water (like rainwater with dissolved CO₂, forming carbonic acid). This dissolution creates underground cavities that can collapse to form sinkholes.
• Option B: Florida has relatively flat terrain, so steep slopes and mass wasting are not the main cause.
• Option C: Glacial activity is not a factor in Florida's geology as it's far from glacial regions.
• Option D: Sinkholes are not formed by lake evaporation due to climate change; they are related to bedrock dissolution.

So, the correct option is A.

Answer:

A. The bedrock is composed of limestone, which is easily dissolved in slightly acidic water.