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8 March, 02:30

Explain the difference between underwater sinkholes and underwater caves? Select one:

a. Really there is none

b. Caves involve many connected sinkholes

c. Caves are larger than sinkholes

d. Only sinkholes reach the earth's surface

Answers (2)
  1. 8 March, 03:02
    hi there!


    well for me is C) Caves are larger than sinkholes.

    Caverns and Sinkholes

    Groundwater is an important part of the water cycle because it is where rainwater and snow end up after they hit the ground, soaking down into the soil. Once in the ground, this water either stays there for a very long time or it discharges into streams and rivers, keeping them flowing smoothly.

    Water is a very powerful substance. When water moves underground it can drastically change the landscape, like when it creates sinkholes and caverns. Sinkholes are funnel-shaped holes in the ground, and caverns are large open spaces underground.

    Sinkhole Formation and Effects

    Groundwater is important not only to the water cycle, but also to us. We pump groundwater for a variety of uses, like crop irrigation and drinking water. However, groundwater also acts like a support system for the ground, similar to how the bones in your body provide you with support. If you suddenly removed all of your bones, you'd fall to the ground like a big pile of mush.

    The same happens when too much groundwater is removed too quickly - the ground collapses into the open space below and the result is a sinkhole. Sinkholes come in all shapes and sizes. Some are small and simply look like dips in the land, while others are so large that entire city blocks collapse into the ground. Water is not the only important structure underground, though.

    The soil and sediment also play an important role. Sometimes groundwater dissolves these sediments, leaving little left to support the ground above. Just like with removing too much groundwater, the ground sinks down into the empty space (which is exactly why they're called sinkholes) and fills the void left where the sediment stood before.

    When the land surface lowers into the ground like this, we say that the land has subsided. Subsidence not only creates quickly falling sinkholes, but can also cause large-scale land sinking over long periods of time.

    Cavern Formation and Effects

    Caverns form in much the same way that sinkholes do. Sometimes when groundwater dissolves sediment underground it simply leaves a big hole and the ground above doesn't fall in. These holes are caverns.

    Groundwater is stored in underground reservoirs called aquifers, which get dissolved by rainwater as it soaks into the ground. Cracks develop in the aquifer and as time goes on those cracks get larger and larger, forming channels underground.

    Eventually they may get so large that they form underground rivers, connecting caves and caverns like a giant highway beneath the surface of the Earth.
  2. 8 March, 03:49
    B ...

    Is the option ...
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