1. In what type of terrain are sinkholes usually found?
Sinkholes are usually found in areas that have karst terrain. Another word for karst is porous rock.
2. Explain how a sinkhole is created.
Sinkholes are usually created by the water that flows beneath the topsoil. Then acidic water flows down to the bottom. The acidic water erodes a lot of rock underground and cave systems are formed. Eventually, the weight from things above ground becomes too much for the land to handle and it collapses and caves in.
3. In which parts of the United States are sinkholes common?
According to the article, many sinkholes occur in Florida. When I researched sinkholes that occur in America, I got quite a few results for sinkholes in Louisiana.
4. How can human activity and natural phenomena trigger a sinkhole to form? Explain.
Human activity speeds up the process and triggers sinkholes to occur. For example, a farmer might be pumping water from underground, out of the ground. This means that there is no water pressure to hold up the land and it will speed up the process of a forming sinkhole.
5. List at least three warning signs that indicate a sinkhole might be about to form.
-There might be a circular crack in the ground or a bathtub-like impression
-There could be trees or fence posts that tend to sag.
-Rainwater could be collecting in rare or unlikely places.
6. What can be done if a developing sinkhole is detected? Explain.
If you can tell that a sinkhole is starting to develop, you can get specialists to fill the sinkhole in with like solid grout or cement. Dirt isn’t used because a sinkhole is a conduit -which means that there could be electrical cables in it- to an underlying aquifer- a layer of earth or rock that allows water to pass through or that contains water.